Just a quick tip: If you are like me and look up Wikipedia often for stuff (me for TV show episodes and other current info), fire up Dictionary and you can access Wikipedia from there. I tweaked the setting to a more friendly Arial font (needs some hacking), set the icon to the wikipedia one and made wikipedia my default dictionary in it. this way, I don't need to fire up firefox if I just want to look up something. Plus, it's built in too and something I've been looking for that's similar to the Wikipanion I got for my Touch.
