Passed CVOICE in the high 900s.
First off, let me say, this exam is somewhat unfair. It appears to be pulling a certain amount of content/questions from the previous generation (642-435) CVOICE Quick Reference Sheets, the GWGK Quick Reference Sheets and the book "Cisco Voice Gateways and Gatekeepers". In other words, after they dropped the GWGK exam, they just moved some content/questions over to the new CVOICE exam. That is my impression. You could have the entire CVOICE 642-436 book and 642-436 Quick Reference Sheets memorized and not answer a few of the questions.
I had the old CVOICE (642-435) Quick Reference Sheets because I accidentally bought them when I first got my Amazon Kindle--I meant to buy the new ones but got the old ones--Amazon was selling both for some reason. I also wasn't satisfied with the Gatekeeper coverage in the CBT Nuggets CVOICE series, so I also watched the CBT Nuggets GWGK series.
So what I used for studying:
1) 4 Analog Telephones
2) 4 Cisco 2811 routers with a mix of VIC2-2FXS, VIC2-2FXO, VWIC2-1MFT-T1/E1, VWIC-1MTF-T1, WIC-1T, PVDM2-8 and PVDM2-16.
3) 3 Catalyst 3550 PoE
4) 3 Catalyst 2950 EMI
5) Cisco Voice over IP (CVOICE), Third Ed. (read twice)
6) CCVP CVOICE Quick Reference (current version for 642-436) (read once)
7) CCVP CVOICE Quick Reference (previous version for 642-435) (read once on a long flight)

CBT Nuggets CVOICE videos (watched twice)
9) CBT Nuggets GWGK videos (watched once)
10) Cisco CVOICE6 Student Guide Vol. 1 and Vol. 2 (reviewed once)
11) Cisco CVOICE6 Lab Guide (used as basis for labs using #1-#4)
On to CIPT1---got three CUCM7 servers operational under VMWare with six 7940/7960 phones, finished the old CBT Nuggets CIPT41 videos and I'm about 1/2 the way through the new CBT Nuggets CIPT1 videos.