Nokia Image Exchange is a welcome upgrade for the "gallery" which is annoyingly slow on the N82. The Image Exchange app is much faster and has a "cool" image rotate feature (picture is shown correctly regardless how you turn the phone) and for the most part it works much faster than the old gallery app (there are still some very annoying completely unresponsive moments - which could be due to other software on my phone).
I love the fact that I can back up my photos directly to the web, without having to wait for Bluetooth transfer, which is a tethering nightmare on a dual-boot computer. It is now possible to completely ditch PC suite and run Ubuntu full time :)
I have had a few issues with images not being backed up after changing the connection. After a phone restart the backup worked again.
Speaking of connection, I find it a very nice feature to have primary and secondary access points. Personally I would have preferred these options to be controlled by the OS rather than each app, but I guess in this case with data heavy backup it is a nice way to prevent the app from uploading via 3g, with the potential risk of an expensive phone bill.
Keep up the good work Nokia!