Here is a thought, maybe not worth two pennies. I have seen forums around the net, gaming forums, wikia forums, developer forums and so on. And people love to relish making their signatures as cool and as "intimidating" as possible, for others to view. As if trying to say "Look as my sig, I'm the one to deal with in this forum!" And then I saw that some specific forums (specially wikia-related forums and gaming forums) have developed a little nifty JavaScript gadget (PHP-fed, of course) where they could display something in the signature of the user; something that would "add" status to the user.
I used to play PlanetSide and BF 1942 a few years ago, and I used to carry a signature in their specific forums where it would show how many enemies I've killed and how many battle hours I had, which was kinda cool... My wikipedia signature still carries the amount of contributions I have made to Wikipedia (but it is now limited to be shown only inside the Wikia user's page, within Wikia).
So I thought, if there would be a signature which people could attach in language-related and China-related forums around the web, where it would display something like "I've learned xxx amount of new Chinese characters in the last xxx amount of time, ad so can you! Try Skritter!" It could also be a jaw-dropper as I just saw how a member had more than 4 hours a day of study and neared the 1700 characters, and I was like "Whoa!"...
Anyway, just my two pennies...