Sat for and passed (with an 89) the VCP 310 exam on October 30th.
Wow - what a challenge! I work with VI3 every day and I'm in the middle of a massive implementation. However, I still found it necessary to study for about 40 hours in preparation for the exam.
I studied all of the recommended manuals (resource, sysadmin, install, install), the configuration maximums, and the available vcp quiz questions from the VMTN community. I also found it helpful to prepare detailed study notes using the VM install and configure class guide.
Good, challenging exam with lots of questions that really got me thinking.