What I did was send myself a "Recruit a Friend" promo thingy and started a trial account w/the key from the promo (I get 30 days free on my main account for recruiting).

Then I got on the phone w/Blizzard Billing and upgraded the account. No wait times on Grouping or whatever, played like a normal account after the phone call. Also got 30 days free on my old account.....

EDOT: oh yeah, Blizzards online upgrade for Trial accounts is really buggy, thats why I phoned them.