You can use JSPlugin and wiki markup to generate a RecentChange -equivalent table but with sorting and filtering - and much more compact output. Here is an example:

And here is the code:

%%sortable
%%table-filter
[{JSPlugin 

var myDate = new Date();
myDate.setDate(myDate.getDate() - 30); 
result = "||Page||Author||Date\n";
for ( i = wikiInfo.pages.iterator(); i.hasNext(); ) {
  page = i.next();
  if (page.getVersions().size() > 0) {
    version = page.getVersions().get(0);
    pageJavaDate = version.getModified();
    pageDate = new Date();
    pageDate.setTime(pageJavaDate.getTime());
    if (pageDate > myDate) {
      result += "|" + page.getName() 
             + "|" + version.author 
             + "|" + pageDate.toLocaleString() + "\n";
    }
  }
}
result;

}]
%%
%%

---

With the help of some java you can sort the list of recent changes by date and display only the top X changes:

%%sortable
%%table-filter
[{com.ingenta.jspwiki.plugin.js.JSPlugin 

var maxDisplaySize = 20;
var mySortedMap = new java.util.TreeMap(java.util.Collections.reverseOrder());
result = "||Page||Author||Date\n";
for ( i = wikiInfo.pages.iterator(); i.hasNext(); ) {
  page = i.next();
  if (page.getVersions().size() > 0) {
    version = page.getVersions().get(0);
    pageJavaDate = version.getModified();
    mySortedMap.put(pageJavaDate, "|" + page.getName() 
             + "|" + version.author 
             + "|" + pageJavaDate.toLocaleString() + "\n");
    if (maxDisplaySize>0 && count++>=maxDisplaySize) break;
  }
}

mySortedMap.size();

var count = 0;
for ( i = mySortedMap.values().iterator(); i.hasNext() && count<=maxDisplaySize; ) {
  result += i.next();
  count++;
}

result;

}]
%%
%%

Also adding the squared brackets around the pagename in the output will enable links to the recent changed pages:

  mySortedMap.put(pageJavaDate, 
               "|[" + page.getName() + "]"
             + "|" + version.author 
             ...