I've done a basic upgrade to 5.0 since I needed it for my site. I've included it here in case it might save you some time. I think I've covered everything (I've been thru the 'upgrade to 5' page and checked it against that), and I have it working fine on my local XP, PHP5.1 machine and the Linux, PHP4.4 server - both Apache. I can't say I've exhaustively tested all feature of it, but it seems to work (i.e. the teasers have changed!). .info file to follow.
Also... the module I'm including includes the patch at http://drupal.org/node/85729
Oh... I hacked the module on XP so it may have cr/lf line endings... and also I may have used the occasional tab instead of double space.