Your best bet right now, for picking up the basics of Valyrian (mainly High Valyrian or HV as we call it here) is to look at David Peterson's blog at
http://www.dothraki.com As of Monday, David posted some very useful declension tables that should get you off to a good start.
I am waiting to hear from Payoang from LearnNavi (who hosts this site, thank you, LearnNavi!) about getting the wiki going. I am hoping to have a few hours this weekend to get a Valyrian section set up here on the forums.