Hi,
I thought I would add my pennies worth to this thread.
I have bought Google Checkout level 2 from Magnetic One and have found their service and support excellent, and certianly no worse than the other mod compaines out there (of which must of them I have dealt with)
I would recommend the google checkout module to anyone as it was cheaper than upgrading my site or getting xcart to mod 4.0 for me. And I have many orders going through google checkout with no problems at all.
Looking at getting thier new Tag Cloud mod now