Found from one blog a post about a free ESXi transition course and the free ebook got me intrested, i think i have some knowledge about vmware and ESXi but it is always good to get more information and input in the topic..

for those who want the ebook here is the link http://blogs.vmware.com/esxi/2011/04/become-a-true-esxi-expert-with-the-new-free-vmware-elearning-course-and-ebook-offer.html