Because some hobbyists took it upon themselves to target the TCM825x camera - once again the community comes to the rescue; whereas Pidgin is an opensource app that's being built (the binaries) when the app updates and nobody is tackling that when somebody could or should.

Preferably from within the Pidgin organization since not even Nokia uses the N810 camera much themselves.

I'm speaking only from a N810 owner experience. And I hope that Pidgin 2.7.0 shows up soon.