The price is the same as via Paypal/Moneybookers, at 1 US cent per credit, and pre-sized packages are available at $5, $10, $20, $40 and $100.
I’ve been following Bitcoin for a while, but not yet sure how good the payment processors are going to be long-term. I’m with Coinbase for now to test the waters but you can pay from any wallet provider (or your own wallet of course) as part of Coinbase’s checkout process (i.e. you don’t need a Coinbase account). Any problems, questions or whatever please let me know.
How are you liking Bitcoin?