Sharebuilder will give you miles with various programs for opening an IRA, but may charge you fees to haul another IRA over to them. Example: wife and I each opened both a taxable and IRA account during the USAir promotion at Christmas, 3000 miles posted, x4, so 12,000 miles or half a free US ticket.

The promo at Christmas offered to give you 2.5x miles as a bonus, so 30,000 more bonus miles on the way in a couple months.

Voila.

YMMV, but there you go. Be careful of transferring securities in/out of brokers, as they may charge an onerous fee. Better to either sell the securities in your existing account and transfer cash, or perhaps just leave the existing IRA where it is, and use a promo for this year's IRA.