When you have attended VMworld in the past you must have seen the hands on lab environment VMware has created there each year. The labs you can take there allow you to get introduced to VMware products that you haven't worked with yet and the labs allow you to learn more about products you already work with.
These labs are now available online for free
VMware has released a free on-line eLearning module that explains the new features in version 5.5. This one hour module will walk you through new features. You will learn what the new hardware maximums are for your host and for virtual machines and what is new in VM hardware level 10. Other features that are covered in the training are: