You might notice at the top of the forum is a new tab labeled IDShare. This is a new Vanilla Extension I am developing that makes it easier for forum members to share their usernames and IDs for social networks and video games. This extension is nowhere near perfect or complete, so expect there to be hiccups.
The way it works right now is you go to the Account tab and click on Personal Information in the left sidebar. At the bottom there is an area to Add Custom Information. If you set a Label equal to one of the items in the IDShare pulldown menu, then the value you have set will appear to users who look that up in IDShare.
This extension is still under development, but I am the sole developer. Consider it a pre-beta. I mean, I've only worked on it for a total of three days worth of train rides. If you have any suggestions, bug reports, etc. this is the thread to post them in. If there are any items you think that I should add/remove from the list, this is also the place to say so.