GML, a utility to load mail into your Gmail account. Also includes a bunch of utlities to reformat formats such as Outlook’s PST into mbox for loading. Will let you know how I make out:
http://www.marklyon.org/gmail/gmailapps.htm
UPDATE: It does work as promised. It’s not high speed – the developer’s thoughtfully restricted the upload process to a message every two seconds to avoid flooding the accounts – but otherwise works just fine. The catch? Very nitpicky, but the messages are date stamped from the time they’re received. As a result, years old messages will appear at the top of your Inbox. The date within the email is correct, however. For now, that’ll keep me from using this, simply because I’m still too traditional in my Inbox organization to abandon chronological sorting. But if you’re wondering if it works, wonder no more.