Slow page rendering

I have been browsing the support pages and have seen instances that are not exactly like mine so I’m starting a thread. Please direct me elsewhere if I’ve missed it.
I recently(just today) noticed that my WP blog takes forever to load. This is just the actual public side of it, not the admin or “inside” of it. I’m running 1.5 and all the other standard stuff(PHP and MySQL on a mandrake box). I whittled the slowness to just this(WP’s public face) by testing other sites running off the same apache server(which load as fast as before) as well as other PHP-based apps(phpBB, galery, etc.) and other mySQL-dependent apps(same as before). All the other sites/apps produce normal results, which is to say they respond within an acceptable 0.5-1.5 second timeframe(it’s a slow box). The neat thing is that the guts of the WP install seem to proceed quite zipply. The admin area(when I can get to it) allows me to click on tabs, write and edit posts–everything on the admin side of things. When I have to go and actually VIEW the site it slows down. I haven’t made any changes to the WP install or the box recently, and I’m pretty sure everythign else is fine because WP seems to be the only thing affected by it.

Anyone ever heard of/seen this sort of thing?

Cheers,
Chuck

p.s.- Feel free to take a look: https://nicholson.homelinux.com/wordpress
(This will take forever to load. If you take off the /wordpress directory you can see the main page. Try the “forum” link if you want to see another PHP-MySQL based app running). If I’m missing something obvious, feel free to let me know.