I'm working towards a first beta release of CG-PowerPack that's compatible with WP1.5, thus I'm numbering it 1.5 to match... ;)
In addition to features from the 1.0 branch, there are now some admin panels for select plugins, and a few new plugins like CG-AntiSpam (what I've been using under 1.0 that applies some rules and the referrer blacklist to comments) and CG-Pagename (you can do <--nextpage:SomePageName-->, and get text table of contents links/list for multipage posts...).
I have locally proven out the compatability of a good amount of the PowerPack code with 1.5 (CG-Amazon, CG-Inline, Amazon+Inline, CG-Referrer, CG-Feedread, CG-AntiSpam, CG-Pagename, ...), though by no means exhaustive, and only on a local XP box with Apache+PHP5.
I know there's a few of you waiting eagerly for some of these, and I'm happy to make a prerelease available (I should probably call it an 'alpha', given how unpolished/unfinished much of it will be...).
Lemme know here or cgcode at chait.net.