Best note-taking (tie): Evernote
The third note taker you should consider is Evernote, a Web-based service that collects snippets of information -- more Post-it-style notes than detailed meeting notes, though it can do those to -- and synchronizes all that info across your devices and computers. You can create buckets and move items around them, and you won't be as likely to lose them as you do all those scraps on your desk. For collaborative note-taking, Evernote offers several paid subscription options.
Price: Free (app); $50 for pro subscription
Compatibility: iPad and iPhone