[rjsw]

I wouldn't describe the Free SIM cards as prepaid, they are a pay monthly subscription.

You can also order them online for delivery to a specified address, they don't seem to check whether it is your home address but mine is paid using a French bank account which may help.

[rhblake]

You can actually choose between having a normal subscription (where they charge your card monthly) and paying for a certain number of months (1 or 2 iirc). If you choose the latter you have to make a new payment manually (where - again - you choose how many months you wish to pay for), otherwise your number will be automatically terminated. I'd say it's fair to call that prepaid.