I really want to use Ubersmith Pro and/or DE, but I need Google Checkout gateway, which Ubersmith didn't have until now.

I see most billing systems like WHMCS, ClientExec, etc supported Google Checkout and a lot of other gateways, but I don't understand why Ubersmith didn't develop a module for GC.

I even emailed them a few months ago and asked if they can develop a GC module for me and I will pay for them, but it looks like they don't interest in Google Checkout or want to develop one. It's so weird!