I've been riding in to work once or twice a week now. I'm using a Trek 8000 mtb from about 15 years ago that I've outfitted with slicks, and I'm getting much faster as a rider. (I'm a long time roadie, so switching to an mtb really slowed me down right at the start of the season when I was out of shape.)

I've been using a backpack strapped on to a Blackburn rack that's been on the bike since it was new. The rack itself was part of the Blackburn child carrier. I carry a laptop and some clothes and all the usual crap that I need, cell phone, keys, wallet, ID, etc... One thing I don't carry is a lock, I leave that on the rack by the office. The backpack works OK, but I was thinking about maybe an easier system to use, and one that would be OK for carrying around the office. My thought was also leaning towards a commuter specific type, maybe with a special laptop case??? Is there anything like this? I'd also like to sling it over a shoulder like a messenger bag when off the bike.

Any recommendations? I haven't stopped by a shop yet, I was just thinking about this on my way home today. I checked Nashbar, Performance and Colorado Cyclist, but didn't see anything I thought fit this, but I'm sure this is made. If not, I'll start making them for the NYC market!