Those are cool. Have to check them out for a smaller version when I just want a stylish one ot walk around with (sight seeing and such.)
My SIL brought her's over last night for me to try on. I'm torn between her bag and a similar one I found on Amazon last night. I want it for my weekend trip this Saturday.
Lowepro Lingshot 100 AW. It has a lot of pockets and a removable divider for the main compartment, but no outside pockets for easy access to an extra lens 9you have to keep it with the camera body in the main compartment.
or
Case Logic SLRC-205
It has an outer padded pocket that you can keep a spare lens in for easy access, It also has a small pocket on the sling strap for your cell phone (which sounds silly, but I wouldn't carry a purse on top of this bag when out.) THis one is also less $$$, but still has excellent reviews.
I have to say I'd want easy access to the extra lens. I like to shoot lots of things with my macro lens so i like to be able to quickly switch. I took a bag on a camping trip recently that only had one compartment and I found myself wishing I had a holster or something for a second lens. That said I don't even have a real camera bag so...