Joe Shepley asserts that you can't do records management in SharePoint. Very provocative post but I'd argue that most if his argument relates to enteprise RM regardless of system. That said, you really need to read the comments. There are a lot of them but they are very good; there are quite a few vendor comments and they are likewise highly informative and not "sales-y".
Update: Mimi Dionne posted a thoughtful response on CMSWire that led to another lengthy set of comments that you'd also do well to ready.
And if you're not reading Joe's blog and Mimi's CMSWire posts regularly, you're doing it wrong.