Chat?

[SilverWarior]

Well, I think iframing it would be better solution (less clicking, more chatting). And of course, it should be available only to registered and verified members of PGD.

I don't think this would be good solution as many mobile device browsers lack IFraming capability.

For cookie issue, maybe it'd be wise increase default cookie length to like 3 hours or so or treat sending message in chat as "site activity" and refresh cookie (possibly last option as it would be cleaner)?

Yes increasing lifetime of cookie could be done easily. But unfortunately the chat message itself doesn't supports cookie interaction so it can't renew them and in such way indicate forum activity.