[Radiant] About page caching

[Mohit Sindhwani]

Hi Everyone

I'm a bit confused about page caching in Radiant.  I'd like to have a 
few dynamic things on a page and I'm wondering if this will be affected 
by Radiant's caching:

1. A page counter written in Perl
2. A set of comments that are grabbed from a discussion forum
3. A feed from another website

I have #1 on a page implemented as below:
<script language="JavaScript" 
src="http://example.com/cgi-bin/counter/gcount.pl?100=te_main"></script> 
hits.
and the counter increments if you reload the page (even within 5 minutes).

It was my impression that Radiant's caching meant that nothing on the 
page changed for 5 minutes.  So, will #2 and #3 not work?

Thanks
Mohit.