There won't be legal issues with Shazam; it's using the licensed Gracenote database. It's also identical to the "Track ID" service that has been included with Sony Ericsson phones for a couple of years now.
I'm pretty disappointed with most of the apps so far. In fact, I think I'd rather go back to the stuff I had on Installer.
Pandora - Sorry, doesn't work in your country.
Last.fm - crashes every time
Hotels.com - LAME, just launches their (non-iphone) web site for the country you're in
TripAdvisor - horrible UI, clunky, odd recommendations
Facebook - OK, but not appreciably different than their excellent web-based iphone app
I miss my Converter, Taskbar Notifier, and location-based apps from Installer.