Check this out! You can try SQL Server 2005 for free really quick with no install! Just click this link and you'll be set up with a quick 20 minute lab that runs in your browser. No need to do a full SQL Server 2005 install and you'll be learning it in no time.
I love the push for more and more quickie learning resources. MS realizes that, for the most part, we are trying to grasp this stuff whenever we have a free moment and most of those moments are less than 1/2 hour, so these 10 minute "nuggets" presentations, Grok Talks, and now these Expresss HOLs are just the ticket! And did I mention they were free?!?
Up next (I wish), free, quick (like 5 minutes) e-learning modules? We'll see!