Downloaded and started using a 156mb iSilo DB last night. Initial impressions:
1. Finally! iSilo for Blackberry is fantastic!
2. Navigation appears to be a little slow compared to the Pocket PC that I'm used to using.
3. Found that using the trackball, when you "roll" right you go into select mode and to get out of it you need to push escape and then you go into "scroll" mode. Up and down but if you go right you're in select mode.
These are merely initial impressions after 10 minutes of use with only 1 DB. If any are interested I will post more info tomorrow.
Again, iSilo for Blackberry, FANTASTIC!