A few more interesting events.
Rising Storm, a pacific front expansion, will be releasing in the coming weeks or months.
A new map pack was released, 4 new maps.
And also a free weekend, with 85% off on Steam, not as good as the humble bundle, but Digital Deluxe Edition is also 85% off, so if you want that it's a good time to get it or upgrade, for 1.50$, I believe.
Over 70k of the Humble Bundles have been purchased so far, so along with the free weekend, expect a large influx in server population.