Here is a handy blog tracking some of the initial quirks of fcpx.
See also Larry Jordan’s blog on his thoughts on sticking/switching/praising/despising FCPX.
Personally I’m sticking with FCS3 and waiting for the free version of lightworks for mac. (out soonish!)
In the meantime here is a link to some free FCPX video tutorials courtesy of Izzyvideo.com