The trackpad is one of the better ones out there typically IME. But yes bluetooth does work fine and is usable for wireless mice and keyboards. Ihave two bluetooth mice on my MBP now in fact, one smaller one in my bag for travel and a primary one for at my desk and working.
There are video cameras that can use USB for transferring video, but I don't know that Mac has ANY support for this, and it only appears on the low end consumer models I believe.
iMovie got murdered earlier though and I still prefer the old version. Of course I work in FCE myself now which kills both of em
Tria- it is worth noting that the 2 USB cable is due to one being out of spec, and on many laptops all the USB ports share the same power supply lines, thus using 2 USB cables is not always a good idea. For instance i know my old powerbook had an internal breaker reset when someone hooked up one of those drives to it, and I have gotten current draw warnings on my MacBook Pro about that as well causing the ports to be shut off till I restarted the computer.
So yes, FW all the way and an external 2.5" is a great combination. To bad Apple has axed any chance of using it on one of their laptops, and done something incredibly limiting on their 'Pro' model.