http://www.borders.com/online/store/...ew_ereaderapps
For those who need yet another outlet for purchasing ebooks, Borders eReader app for Android is now available. Not exactly sure yet what--if any--advantages they have over the other ebook stores. They use the ePub format, so it will run on the eInk side (unlike Amazon, which only displays on LCD).
EDIT: Just saw, it requires Android 2.x or higher, so no running it on the eDGe for the time being.