Wow, I just noticed this new access multiple accounts in one browser feature at the end of my lunch and had to write a a quick bit about it. First, a message from our sponsor (lol). But seriously here’s an interesting quote from Macduff Hughes’ post on the Gmail blog…

Now, you can visit google.com/accounts and click the link next to “Multiple sign-in.” After you sign into your first account, you can sign in with up to two additional accounts from the new accounts menu in the upper right hand corner of Gmail, then easily toggle back and forth between them. You can even open multiple Gmail tabs — one for each of your accounts.
- Gmail Blog, Access two Gmail accounts at once in the same browser

I’ve got to check this out more later and add more – its such an exciting feature with possibilities. One caution, read the Gmail post because access via one browser to multiple accounts is not working universally yet and the post lists these exceptions and notes.