Ive just brought a Tattoo, only yesterday XD
I think the apps for it are fine! Of course, most probably not such a wide range as say the iStore for the iPhone, but who cares.
I have successfully installed:
Last.fm, Spotify, Absolute Radio, AK Notepad, Bluetooth File Transfer (doesnt work with Tatttoo btw!), Discogs, Discount Calculator, eBay, eBuddy, ES File Explorer, Facebook, NetCounter, Photoshop Express, Sky+ (which is freaking awesome), UK Traffic Checker and Yell.com
About 2.1, well it seems like it could be a along awaited Christmas present from Google. The reason why people want it soo badly, or the main reason, is that it comes with Bluetooth File Transfer (which atm with 1.6 you have to root/hack the phone to allow this).