Here is my little test project. A FluxBB forum with added BitCoin client (via JSON-RPC, of course) and payID functionality.

https://web-attack.org/dev/

The client works just like the desktop one, except without generating coins, of course. Be sure to add a BitCoin address when first visiting the BitCoin tab in the profile.

PayIDs, on the other hand, allow one to easily sell access to any information to any other forum user. Basically, you register as a forum user, add yourself a payID for each item you are selling, then put the data to be sold inside the [pay=xxx]data[/pay] tags, replacing xxx by your payID number.

Soon after I'll clean and polish the code it will be opened under the terms of GNU GPL.