Sorry to be the bearer of bad news, but the Revue has performance issues with the slingplayer and it doesn't look like the problem will ever be fixed. If you can, return it for either the Vizo Co-Star or one of Sony's GoogleTV models. We Revue users have been experiencing this problem ever since the Revue got the O.S upgrade to 3.2 rendering the slingplayer useless. Sounds like you are running O.S 3.1, because it was usable, but buggy with the freezing issue you are currently experiencing. Unfortunately, It's not something that's going to get fixed, because it's been a while now and I think Google, Sling and Logitech have thrown in the towel on this issue with this hardware.
Just know that I've heard that the Vizio Co-Star ( from users on the forum ) and the Sony NSZ-GS7 ( from personal experience ) works fine with the slingbox without any of the freezing issues you are experiencing.
See this thread :
Thanks for telling me. It's unfortunate that they won't fix it. What they need to do is remove support from their website because it's misleading. This was one of three "supported" devices that will work with Slingplayer. I chose this one because it was the cheapest. Well, I just submitted a return through Amazon and will be purchasing the Vizio Co-star. The one thing I liked about the Revue was the full-size keyboard. Oh well. Thanks for the quick reply!