2,500 Free US Airways Miles with Sharebuilder Account
Simply sign-up via US Airway's direct link (here) and enter your personal information- it took me about 5 minutes. Although it states that you get 2,500 miles after your first trade, many people are reporting getting the miles automatically - even if you've been a member in the past. It also states you'll get the miles in 6-8 weeks, though most people are reporting the miles after 3 days.
This may very well end soon, but you might as well try getting in now since there is no cost to sign up and you don't have to fund an account (though if you want to do online trades, they start at $9.95, which is still a cheap Grand Slam hit). Just remember, US Airways has some severe rules about Grand Slam memberships, so keep your account active until June 2012 to be safe.
*Mileage Disclaimer: You must open a new ShareBuilder account to be eligible for the initial bonus miles. Limit one per unique customer or custodial beneficiary. Dividend Miles Members will receive 2,500 bonus miles after opening a new account and purchasing their first security. If a member subscribes to the Advantage Program each month, they will receive 500 additional bonus miles for every active quarter during the calendar year.
Please allow 6-8 weeks for miles to post to your account. All Dividend Miles program rules and conditions apply. To join the Dividend Miles program, please visit www.usairways.com/dm