Recently first service pack for Maya 2011 was released. It contains all previous fixes from Hotfix releases ( there were 3 of them ) and new ones. Now it's good time to switch over to new version of Maya for all those, who unable to do that previously due to bugs or something like that.
Maya 2011 — what's new?
First of all, let me mention that this release of Maya was ambiguous — from one side, it's such kind of release which affects every user: if previous versions receives new tools and other — updated ( nParticles in Maya 2009, for example ), then some highly specialized users may not notice this changes at all ( because they just never use it ). This time it's different — interface itself was rewritten, so you should feel changes right after launch of Maya 2011. From other side, there was three Hotfix-releases already and now — Service Pack, which means that quantity of bugs in code are relatively high. High chance that even with SP1 not all of them are eliminated ( or almost all, because bugs will be here forever, Maya it's just too complex system ).
Of course, changes and new features not limited to rewritten interface, there are a lot more of them. Read full list of changes on Autodesk's web-site — What's new in Maya 2011?
I will point just some of them: