The makers of pMachine have just introduced their next generation blog/web publishing tool, Express Engine, and it looks a lot like a big, brawny content management system. If you're interested in such things, you can arrange a test drive here.

POSTSCRIPT: One thing to be aware of: At $199.00, EE's not cheap. You might want to try out some of these free, open source CMS's as well if you're thinking of moving in that direction.