Well three weeks of intense study has certainly made me wonder why I tried this with so little study material. I have booked the exam for next Wednesday so I will be cramming big-time over the next week to bone up on where I am slightly fragile.
For study material I have used the Learnkey CBTs and the Syngress Security+ book for my main study sources. Unfortunately I would not recommend the Syngress book at all - the DVD that accompanies it is virtually worthless and I find the book very difficult to follow. It may just be me, but I have borrowed Syngress books from the library for other certs and find that they are all not my cup of tea. From previews of the Sybex book and a couple pages sent to me to view from the Mike Meyers Passport series I would rate either of them as much more suitable.
On the Sybex site you can download a couple sample chapters from their book to get a feel for it.
I supplimented my study with an excellent PDF authored by Tcat Howser and Helen O'Boyle -
http://www.alphageekproductions.com/
I heartily recommend it and suggest that you download the Ebook for only $20.00 - they also have a neat referral scheme (NOPE, I am not using that or involved with it in any way) that enables you to get generous credits.
I have been fortunate enough to obtain a couple practice tests to suppliment the questions I wrote a couple weeks back and it looks like I am in the ball park with my material, however I have come across a few errors on the Boson tests where the exact same question comes up a couple times with different answers.

I have also come across questions dealing with subject matter I have not extensively read up on - such as RAID 6/7/10/50/53 *gulp*
For those studying for this exam I would recommend boning up on IEEE 802.s, Standard Ports + a few needed for Kerberos & SSH/HTTPS, cabling standards, and the OSI 7 layer model. These items were briefly covered in the Syngress book, but appear a lot in the various testers I have obtained.

Geez I hate that stuff ... lol
I have also been sent a really neat site for boning up on certain Security related terms and acronyms ...
http://www.itsecurity.com/dictionary/dictionary.htm