If you’re interested in checking out some of the new features in 2.2 like the Rubrics and Advanced Grading, the MyMobile theme, LTI or any of the other coolness [release notes] you can without any risk at Gnomio’s 2.x site http://www.mdl2.com/ according to a recent tweet.
MDL2 is listed on the Moodlenews hosting chart and provides free but ad-supported hosting. Great for testing or providing free instruction, but less so for real classroom use.
Check it out and get your own site at http://www.mdl2.com/
