Basically any of the non-Apple tablets will be Flash compatible. There's even an app for the iPad that will allow you to view Flash content via a format converter. I thought I had a post about it on m FB page but can't find it now.
Samsung is coming out with their second generation of the Galaxy Tab soon. Acer is coming out with 3 new products, a 5" phone, a 7" tablet and a 10" tablet. By the middle of this year, there should be plenty of tablet product available.
The Xoom isn't going to be cheap. Right now, it looks like it'll be the most expensive tablet out there, http://www.engadget.com/2011/01/22/motorola-xoom-launching-february-17th-at-best-buy/
but the feature set and specs look to be about the best as well.