I passed my Sec+ exam (2007 edition) today with an 876/900.

The exam wasn't as hard as I was expecting, but that's probably because I did a lot of study before taking it. Now I understand what everyone was saying about poorly worded questions as well. I hope CompTIA cleaned some of those up in the new edition.
My primary study aids were the Syngress book, Measureup practice exams, this site, and the wikipedia/google. I used the Sybex book as well, but I felt it was a real disappointment compared to some of their other offerings and wouldn't recommend it.
Having a background in networking is also a real plus. For those of you who are considering taking both Sec+ and Net+, I highly recommend taking Net+ first. That way you can focus on learning security topics and not have to learn about subnet masking, ACLs, IPs, network topology and so on all at the same time.
Thanks to all the folks who have provided this great resource, both in the forum and the technotes. It's been a real aid in my studies.