Even as American carriers continue to resist it, a variety of Canada's GSM networks support video calling on so-enabled 3G handsets -- but currently, the problem is that you're only able to video call other phones on the same network. Fortunately, Rogers, Bell, and Telus have been hard at work playing nice long enough to ensure that their respective video calling services play nice one another, and they've just announced the successful completion of inter-carrier trials. The companies are quick to point out that this makes them the "first inter-carrier partnership in North America" to support 3GPP-compliant video calling, something that should hopefully make AT&T and T-Mobile feel at least a fleeting moment of shame. No word on exactly when the service will be available to end users.