Yesterday, I failed the CCNA: Voice exam. Passing was 790 and I got a 766; close, but no cigar.
My lab for the exam consists of the following equipment.
1760-V maxed out
2611XM
3550-24-PWR
2950
4 x 7910
7940
7960
4-port FXS
2-port FXO
After assembling the above lab, I began reading chapters out of the CCNA: Voice book and watching the associated CBT Nuggets video. After 5 or so chapters, I didn't feel I was getting anything extra out of the book, so I decided to just watch the videos and focus on labs. The result is self-explanatory; IMHO, CBT Nuggets does not cover the material well enough to pass the exam. Furthermore, without having a CUE or UC500, I was at a HUGE disadvantage for the exam.
I'm signed up to take the exam again next Wednesday, March 3rd, but may push it off if I don't feel prepared in time. For this run, I will be reading the book cover-to-cover and focusing on CUE and UC500.

For those of you that plan to take the CCNA: Voice exam, I have a few pointers that should be NDA-compliant. (If you feel that any part of this post is beyond the NDA, let me know and I will modify it accordingly)
Do not underestimate the amount of material on the UC500! In fact, you should know every tab, box, button and pop-up in the "voice" area of the interface and know how they compare to the CLI configuration. It seems Cisco would rather ask questions about pictures than about actual configuration. Jeremy Cioara describes each of these tabs in the CBT NUGGETS series, but doesn't go in-depth enough for it to be an effective training tool. I would really like to get a live interface into a UC500, but I dunno if I can pull that one off by next week.
Make sure you know, in depth, all of the possible interfaces and configurations between the router and the CUE module. This includes the IP configuration, all possible dial-peers, MWI, etc.
Anyway, that's that. If you are studying for this like I am, good luck!