I have used some topics of this great forum, and now I want to share my xslt code for multiple twitter feeds.

I hope you enjoy it!

Here is the Date structure of twitter I treated for the code: (If some day it change, now you can format the way you want)
 Wed Apr 28 18:17:03 +0000 2010
 When splitted by " ", it became a Array of 6 elements

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE xsl:stylesheet [ <!ENTITY nbsp "&#x00A0;"> ]><xsl:stylesheet
 version="1.0"
 xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
 xmlns:msxml="urn:schemas-microsoft-com:xslt"
 xmlns:umbraco.library="urn:umbraco.library" xmlns:Exslt.ExsltCommon="urn:Exslt.ExsltCommon" xmlns:Exslt.ExsltDatesAndTimes="urn:Exslt.ExsltDatesAndTimes" xmlns:Exslt.ExsltMath="urn:Exslt.ExsltMath" xmlns:Exslt.ExsltRegularExpressions="urn:Exslt.ExsltRegularExpressions" xmlns:Exslt.ExsltStrings="urn:Exslt.ExsltStrings" xmlns:Exslt.ExsltSets="urn:Exslt.ExsltSets" xmlns:TagCloud.Helper="urn:TagCloud.Helper" xmlns:CWSHelper.twitter="urn:CWSHelper.twitter"
 exclude-result-prefixes="msxml umbraco.library Exslt.ExsltCommon Exslt.ExsltDatesAndTimes Exslt.ExsltMath Exslt.ExsltRegularExpressions Exslt.ExsltStrings Exslt.ExsltSets TagCloud.Helper CWSHelper.twitter ">
<xsl:output method="xml" omit-xml-declaration="yes"/>
<xsl:param name="currentPage"/>
<xsl:template match="/">

<xsl:variable name="MyFeeds" select="umbraco.library:GetXmlDocumentByUrl('http://twitter.com/statuses/user_timeline/itautec.xml?count=5')" /> 
<xsl:variable name="MyFeeds2" select="umbraco.library:GetXmlDocumentByUrl('http://twitter.com/statuses/user_timeline/durafloor_.xml?count=5')" /> 

<xsl:variable name="AllFeeds">
 
 <container>
  <xsl:copy-of select="umbraco.library:GetXmlDocumentByUrl('http://twitter.com/statuses/user_timeline/username1.xml?count=5')"/>
  <xsl:copy-of select="umbraco.library:GetXmlDocumentByUrl('http://twitter.com/statuses/user_timeline/username2.xml?count=5')"/>
 </container>
</xsl:variable>

<xsl:variable name="newTwitterFeedStructure">
 <xsl:for-each select="msxml:node-set($AllFeeds)/container/statuses/status">
  <xsl:sort select="created_at" order="descending" />
  <xsl:variable name="transform-http" select="Exslt.ExsltRegularExpressions:replace(text, '(http\:\/\/\S+)',ig,'&lt;a href=$1&gt;$1&lt;/a&gt;')"/>
  <xsl:variable name="transform-https" select="Exslt.ExsltRegularExpressions:replace($transform-http, '(HTTps\:\/\/\S+)',ig,'&lt;a href=$1&gt;$1&lt;/a&gt;')"/>
  <xsl:variable name="transform-AT" select="Exslt.ExsltRegularExpressions:replace($transform-https, '(^|\s)@(\w+)',ig,' &lt;a href=http://www.twitter.com/$2&gt;@$2&lt;/a&gt;')"/>
  <xsl:variable name="transform-HASH" select="Exslt.ExsltRegularExpressions:replace($transform-AT, '(^|\s)#(\w+)',ig,' &lt;a href=http://www.twitter.com/search?q=$2&gt;#$2&lt;/a&gt;')"/>

  <!-- formating DateTime -->

  <xsl:variable name="Datefield" select="umbraco.library:Split(created_at,' ')"/>
  <xsl:value-of select="$Datefield/value[2]"/>
  <xsl:variable name="mes">
  <xsl:choose>
   <xsl:when test="$Datefield/value[2]='Jan'">
    <xsl:value-of select="01"/>
   </xsl:when>
   <xsl:when test="$Datefield/value[2]='Feb'">
    <xsl:value-of select="02"/>
   </xsl:when>  
   <xsl:when test="$Datefield/value[2]='Mar'">
    <xsl:value-of select="03"/>
   </xsl:when>
   <xsl:when test="$Datefield/value[2]='Apr'">
    <xsl:value-of select="04"/>
   </xsl:when>
   <xsl:when test="$Datefield/value[2]='May'">
    <xsl:value-of select="05"/>
   </xsl:when>  
   <xsl:when test="$Datefield/value[2]='Jun'">
    <xsl:value-of select="06"/>
   </xsl:when>
   <xsl:when test="$Datefield/value[2]='Jul'">
    <xsl:value-of select="07"/>
   </xsl:when>
   <xsl:when test="$Datefield/value[2]='Aug'">
    <xsl:value-of select="08"/>
   </xsl:when>  
   <xsl:when test="$Datefield/value[2]='Sep'">
    <xsl:value-of select="09"/>
   </xsl:when>
   <xsl:when test="$Datefield/value[2]='Oct'">
    <xsl:value-of select="10"/>
   </xsl:when>
   <xsl:when test="$Datefield/value[2]='Nov'">
    <xsl:value-of select="11"/>
   </xsl:when>
  
   <xsl:otherwise>
    <xsl:value-of select="12"/>

   </xsl:otherwise>
  </xsl:choose>
  </xsl:variable>

 
  <xsl:variable name="FinalDate" select="concat(concat(concat(concat(concat(concat($Datefield/value[3],'/'),$mes),'/'),$Datefield/value[6]),' '),$Datefield/value[4])"/>

<!-- Creating the xml string for sort by datetime -->

  <xsl:element name="feed">
   <xsl:element name="feeddate"><xsl:value-of select="$FinalDate"/></xsl:element>
   <xsl:element name="Textfield">
   
<a href="http://www.twitter.com/{user/name}"><xsl:value-of select="user/name" /></a> às <xsl:value-of select="umbraco.library:FormatDateTime($FinalDate,'dd-MM-yyyy HH:mm:ss')"/>: <xsl:value-of select="$transform-HASH" disable-output-escaping="yes"/>
   
   </xsl:element>
  </xsl:element>
</xsl:for-each>
</xsl:variable>

<!-- sorting by datetime -->

<xsl:for-each select="msxml:node-set($newTwitterFeedStructure)/feed">
 <xsl:sort select="umbraco.library:FormatDateTime(feeddate,'yyyy-MM-dd HH:mm:ss')" order="descending" />
 <p>
 <xsl:value-of select="Textfield" disable-output-escaping="yes"/>
 <br/>
 </p>
</xsl:for-each>
</xsl:template>

</xsl:stylesheet>