Those fortunate enough to be MSDN subscribers can download Visual Studio 2010 Service Pack 1 today (8th March). Mere mortals will wait for two more days, until 10th March.
I already wrote about some improvements but there are few more things to come. Those include TFS-Project Server Integration Feature Pack, Visual Studio Load Test Feature Pack and Visual Studio LightSwitch Beta 2. Check sparse details about those at Soma Segar's blog.