Ignoring the snoozefest that was Macworld '09 I was personally happy to see the new iLife details. For me, only iMovie and iWeb hold any interest. I'd normally include iPhoto too, but I've upgraded to the awesome Aperture 2. So I don't care!
iMovie is a great application to break into humble video editing, I've learned and gained confidence with last years version. I'm happy to see improvements like precision editing, smoothing a shaky frames, maps, themes and better drag & drop. Not forgetting animated titles, new transitions, and cinema-quality video effects. OMG I cannot wait to install this!
iWeb drives my two websites, AppleCrypt and the new TravelCrypt. Nice names, eh? Apple appears to have added lots of sharing type content with support of RSS, YouTube, iSight and Facebook. Due to having a real life I don't really take any interest in YouTube, but I might actually log back into my old Facebook account as this could come in handy. I'm going to be very interested in what other features and improvements Apple have incorporated into iWeb, this is a great program that I use almost daily.