How can I install the Amazon MP3 app? I have a Motorola Backflip running on AT&amp;T with Android 1.5. I previously had a G1 with which I used Amazon MP3 all the time to buy music. However, Amazon MP3 doesn't come on the Backflip and isn't in the Market. Where can I find it to install?  

Also, is there a reason it isn't on the market? My guess was because AT&amp;T wants me to use their proprietary app.
Xda-developers has a link in this thread, grabbed from a cc-May-2010 Froyo ROM.

Found it in AppBrain and CyrKet.

Also, it IS in the market as of Sept 14, 2010 on my Incredible. Good luck linking to that one.