Disclaimer: I receive a referral commission for the following link(s) and I greatly appreciate supporting the site: Betterment
Update 1/1/2014 - This offer is still valid. Keep in mind that they charge an ongoing maintenance fee. For 90 days the fee won't be much, but make sure to cancel once the 90 days are up.
Betterment.com is an investment site that is offering a $25 bonus if you deposit $250 with them for 90 days.
New account sign ups only.