You can do this without any hacks via javascript by utilizing the external.php?type=js
If you want to have recent posts via php on a non-vBulletin php based page, I'm pretty sure the hack already exists somewhere on www.vbulletin.org (99.99% positive, actually)
cscgal
The Queen of DaniWeb
19,421 posts since Feb 2002
Reputation Points: 1,474
Solved Threads: 229
Should also be an RSS version of the recent posts, shouldn't there?
digital-ether
Nearly a Posting Virtuoso
1,293 posts since Sep 2005
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Solved Threads: 101
cscgal
The Queen of DaniWeb
19,421 posts since Feb 2002
Reputation Points: 1,474
Solved Threads: 229