Roosecase Multi-Angle for Asus Transformer for $23.96 Shipped
This is the top selling Asus Transformer case on Amazon, if you bought the case directly from PCMicroStore, you can get it with 20% off coupon, free shipping, and no tax (unless you're in California).
Total shipped was $23.96 with 20OFFTABLET
coupon (limit use, first 1000).
If you purchased through Amazon, it's $29.89 shipped.
There's 3 different colors you can choose from:
If you want something more robust, the Executive version is also a really good choice from reviews I've read.