The volume of free training available for SQL Server in the cloud is continually increasing. The best sites I have found are below.
TechNet Virtual Labs: SQL Server 2012 Virtual Labs
This allows you to evaluate and test Microsoft's products and technologies with a series of hands-on labs that you can complete in 90 minutes or less.
Microsoft Virtual Academy
This is a training portal where you can learn at your own pace, focusing on Microsoft technologies, gain points and get recognition. There are tracks in SQL Server, SQL Azure, Clustering, Business Intelligence etc.
SQL Server 2008 Microsoft Certified Master (MCM) Readiness Videos
These videos are for those wanting to pursue SQL Server 2008 Microsoft Certified Master certification. Each module establishes the level of depth and breadth required to achieve this certification with deep dive subject matter included. These are good watch even if you are not thinking of taking the MCM exams.
SQL Server Best Practices
Technical White Papers provide real-world guidelines, expert tips, and guidance for SQL Server.
Free PDF downloads of ebooks specializing in database and programming technologies.
Excellant community conference videos of recorded sessions which are available to watch on demand.
24 Hours of PASS
The 24 Hours of PASS event is a virtual stage of SQL Server experts with in-depth sessions on the hottest SQL Server topics over 24 consecutive (and free!) technical webcasts.