Checking out FeedDemon
David mentioned that Beta 1 of FeedDemon was released. After playing with it for a bit I must say that it's very nice. There are a few bugs that I've found that are pretty irritating (read: OPML import didn't work for me), but overall it shows a LOT of promise, and I look forward to future releases.
UPDATE: It looks like James is having the same problem I am. I exported a sample OPML file from FeedDemon and it appears to have some garbage characters in it. Perhaps the Import function shares these problems...
REUPDATE: So far my favorite little feature of FeedDemon is that when you add a new Channel (blog) by URL, it will automatically grab the text from your clipboard if it's a valid URL. That saved me quite a few seconds when I was manually re-entering all of the links on my blogroll...