At last count, RIM has had five preview-peek sessions featuring the long-anticipated PlayBook tablet. Each peek is designed to tantalize potential buyers as well as buy time while developers try to get the product ready for sale. The most recent speculation, stemming from RIM's PlayBook demo at the Mobile World Congress, included another mention that the tablet device will be compatible with some Android applications. This would help RIM avoid being left out of the app development market dominated by Apple and Google. But to date, RIM has offered no specific time for its PlayBook launch.