They are giving away a paid app for free every day. There market is pretty slick. I rooted and enabled side loading using super one click and it works like a charm now. They also have sales on certain apps.
http://www.amazon.com/mobile-apps/b/ref=nav_swm_venezia_20110322?ie=UTF8&node=2350149011&pf_rd_p=1291692422&pf_rd_s=nav-sitewide-msg&pf_rd_t=4201&pf_rd_i=navbar-4201&pf_rd_m=ATVPDKIKX0DER&pf_rd_r=1WQ59FCR8295XYVFV721
Quite nice.
http://www.amazon.com/mobile-apps/b/ref=nav_swm_venezia_20110322?ie=UTF8&node=2350149011&pf_rd_p=1291692422&pf_rd_s=nav-sitewide-msg&pf_rd_t=4201&pf_rd_i=navbar-4201&pf_rd_m=ATVPDKIKX0DER&pf_rd_r=1WQ59FCR8295XYVFV721
Quite nice.