I'd suggest something similar to Aidara's idea, which would be thread challenge medals. We can even use it to encourage/motivate people to do things they normally wouldn't, or things to liven up the site, by using these incentives.
Say, maybe certain cities/areas have too little activity. Make a 'lonely city' medal that is tailored to the city's themes. For example, if Sunberth has too little activity (just saying, coz it'll probably never the case

), thread challenges can be starting a fight, commit a petty crime, plan and execute an ocean's eleven with other PCs, piss off a major syndicate, etc. Something similar to Levi's Sunberth thread goals.
Or say, maybe there needs to be a stronger PC-driven economy, maybe offer a 'profession' medal, with goals like doing # job threads, making a business alliance, trading across more than 3 cities, (if product/service-driven) created more than 3 products or serviced more than three customers, that kind of thing.
Or suppose a certain city needs more chaos, or a lawless city needs some law and order. There can be thread goals to give an incentive to PCs to do stuff that tilt the balance either way.
I mean, the possibilities are endless. In this way you can guide the players in the direction you want, whether globally (mizahar-wide) or locally (city-wide). And give something to motivate people for NaNoWriMo. So it's really like killing two birds with one stone.
Just my 0.02 ~
NOTICE: I am currently mostly inactive til August. As such, guild activities are temporarily halted (watch out for major revamps, changes and organizations when I'm back in full force). Any activity with Eri will be rather slow as well, but I am slowly readjusting back to "Mizahar life", so to speak, so do PM me if we have a thread that I left hanging and we'll talk.
"You must be one hardcore scholar, Eri." (Laszlo)
First winner of the prestigious Mirage's No Kill Medal.