Can't tell you anything that others haven't yet, but I can give you my opinions :)
For Adobe replacement I use GIMP. Some say it has poor interface and other issues, but as far as I'm concerned it does everything and if it doesn't, there's a plug-in for it ;)
VegasPro... Well, I'm not really in anything above basic video editing and for that Open Shot is awesome. For more complex stuff, I hear Cinelerra's good.
iTunes DO run on wine, but you can't access the store or play CDs. For alternatives, I just use Rhythmbox, but Banshee might be closer to iTunes.
Safari... There's many good browsers for Linux, unless you're really attached to it, you won't miss it.
Chrome, I'm on it right now. Google's made a native version for Linux and it runs even better than on windows. Especially love how you can circle through open tabs by using the mouse wheel. Can't do that anywhere else :) (btw, it says it's still in beta, but I've been using it since alpha and it's always worked nicely.)
Arcsoft Capture Module and Camtasia... Don't even know what those are ^^;
uTorrent... Transmission which comes by default's pretty nice. Does magnet links and peer blocking too.
Live Messenger... If you just need the MSN protocol, go with emesene. Otherwise, Empathy is nice, but I use Pidgin. Used to be default and I got used to it. I think it's also more stable, but they probably fixed Empathy by now.
Hope this helps :D