[trinket]

I wish I could migrate my normal Gmail account (all received email to date, current labels and rules) to my Google Apps for your domain account.

[johns]

It would be time consuming especially if you have a lot of email, but it is possible. Set up your current account in an IMAP client like Thunderbird, download all the messages to local folders, set up the Apps account, move messages into that account.

[nathos]

you can use the new Filter Import/Export tool in Gmail Labs to migrate your rules: http://gmailblog.blogspot.com/2009/03/new-in-labs-filter-imp...