Personally I think that the n810 paired with a bluetooth phone will give you significantly more punch than the blackberry/n95 combo you're using now, though there is a learning curve. I wouldn't get intimidated yet, let me walk you through installing an app and then you can decide how comfortable you are. With web browsing, email, and streaming media you're set to go, just spend some time getting into all the menu's and playing around. Getting DVD's onto the device involves ripping them to your computer and re-encoding them. How familiar with that are you?

Ok, let me back up a bit. Re-reading your initial post to find something useful to install...I should mention that the n810 doesn't have an FM tuner. The n800 does, but lacks gps and the hardware keyboard. The n800 is also really ugly, but that didn't stop me from using for a year - but I digress. I don't have a blackberry, so I don't know if there's issues getting them paired. I would think you'd have less issues pairing it with the n95 if that's an option.

Nothing is really jumping out at me as far as something to install...do you listen to podcasts? Spreadsheet application? Sudoku? PIM apps (calendar, todo, etc.)?