[kh99]

To limit the number of threads, you could do this:

PHP Code:

...
<script type="text/javascript"> 
<!-- 
        var maxlen = 15; 
        var maxthreads = (threads.length < 5 ? threads.length : 5);
    for (var i = 0; i < maxthreads; i++) 
    {
... 


I don't know about the second question - I think you should get threads from any forums that would be included in an external feed.

Edit: The forums need to be readable by guests or they won't be included, maybe that's the issue?