I had originally planned to take this test next Tuesday and use the weekend to for some last minute preparations, but that changed with an interview request for tomorrow. I have already been to the class back in February (Company Paid) and spearheaded the upgrade of my company's current infrastructure from ESX 3.5 with 4vm's to three ESXi 4 hosts and 30 p2v migrations. Just in time for a data center migration. It's been a challenging 7 months.
Besides the class I used:
Mastering VMware vSphere 4
VMware vSphere 4 Administration Instant Reference VCP VMware Certified Professional vSphere 4 Study Guide (Exam VCP410) with CD-ROM 
CBT Nuggets
and a lot of the pdf's from vmware especially the Configuration Maximums document.
I passed with a 350. 

Now back to school work