Blower, it was just an 800IS in a titanium shell. Actually I think possibly all the UK-spec 800s were the same, mine was an import. Very nice bit of kit, my brother's off round the world with it for the second time, it's the main reason I'm so impressed with Canon- that thing's been dropped from a moving motorbike, filled with rain (in a waterproof pocket which I left open at the top, doh!), left in a muddy field on the west highland way overnight, covered in beer at a bad religion gig, filled with australian dust in a duststorm… It looks like **** but it still works perfectly.
(it had to go back to Canon once after the motorbike incident, the case broke- it was out of warranty and not really economic to repair, but they bodged it back together for me and sent it back with a note "Congratulations, we've never seen one of these broken like this before")
Now, I love my TZ7 but I'd happily guarantee that it won't withstand a tenth as much of that sort of abuse. The Ixus was OK for video, the mic wasn't up to much and it was fairly poor at night. The TZ is almost up to standalone home video camera quality, a wee bit less easy to use though. But still, it forgets it's a compact camera.