I think it's worth trying to get it running for the most part. It can be a pain if you do have attributes on things because you will have to email the customer to figure out what color, size, etc. someone ordered for every order.

Now interms of payment choices i have the following:
authorize.net AIM
Echeck
Paypal
Google checkout

about 40% of customers are using google checkout now.

I suggest everyone change the code that was mentioned before to comment out a big chunk of the responsehandler. copy your googlecheckout folder from the admin folder and into a new created one in your main area (yourstore.com/googlecheckout)

That's what i did and i'm getting lots of orders through there now.

I guess this is a beta for a reason...i've enabled table shipping and it's been going into google checkout so far charging shipping charges.