New in Labs: Refresh POP accounts
My little sister recently setup her Gmail account to retrieve messages from her school address, so she can check all of her email accounts in one place. She no longer has to constantly log in to two email programs, and she likes using Gmail's powerful interface for all her mail.
However, sometimes she knows an email has already been sent to her school address, and she just can't wait for the next scheduled fetch to have it show up in her Gmail inbox. As any big brother would, I tried to solve this issue for her and millions of Gmail users.
Turn on "Refresh POP accounts" from the Labs tab under Settings, and the refresh link at the top of your inbox will not only update your inbox with your new Gmail messages, it will also fetch messages from any other accounts which you have set up.
Try it out, and let us know if you have any feedback.