Now you may receive calls from SIP network to your Google Talk running on your own domain, with or without Google for Your Domain service. The only thing you need to do is to add a line into your DNS zone file. Please, read more about our new feature here: http://www.gtalk2voip.com/gtalk_service_domain.html.
You don't need sophisticated soft-switches to install any more to get your company into VoIP! Keep everything in a simple Google Talk application!
This service is currently availbale free of charge!
PS: It also works with MSN/Live Messenger.