So trying to purchase Sentinels of the Multiverse: Enhanced Edition from the site but when I advance to Google Wallet, the shipping options box is greyed out and I get "You do not currently have any valid shipping methods." So I can't advance the order. I'm using Firefox 21.0 an I usually run NoScript and Adblock Plus but I have them both turned off trying to troubleshoot this problem.
I bought everything except the basic set directly. I didn't have any problems. Same setup as you. Don't you choose delivery method before GW? Next day, 2-day, standard?
If you are still having issues with this, please PM me your shipping address. There usually arent any problems with Google Wallet, but I'd like to test with your address anyway. If I can reproduce what you are seeing, I can see if there's an error when we contact FedEx to calculate shipping. It's a bit of a complicated setup, but it does work. :)
I'm glad you were able to find it elsewhere. We are in the process of reviewing the checkout process, so even if there is/was a real problem, it may be moot in a couple of weeks.
I'd still like to clear these off. It's one of those minor annoyances to look at My Account and see the 4 Google Wallet transactions still sitting there months later with no way to delete them.