#2 - Sept. 29, 2010, 5:45 a.m.
The trial account would need to upgrade to a full account and pay for two months of subscription, Applesaucee. Depending on the payment method used is when the rocket will be sent to the Recruiter (the person who did the recruiting).
If a subscription-based method is used, then the Rocket won't be sent until the 2nd payment has processed. As the recruitee (person who was recruited) has a free month plus their trial days, this can take around 70ish days to process. However, if the person recruited pays with a pre-paid time card, the mount will be made available immediately.
To claim the mount, you would need to log into your Battle.net account and select the account you wish to send it to. Once you are at that account's management page, you'll want to click on Referrals & Rewards, then Recruit-A-Friend. There will be a tab entitled 'My Rewards' and from there you can select which character will receive the mount.
Only one character will be able to receive the mount.