The very successful open source MMORPG project "Planeshift" has just announced they have broken the 100,000 subscriber mark...and amazing feat for a non-commercial product.   Here is a exerpt from their official press release:

Turin, Italy (October 28, 2003) – The PlaneShift Development Team announced today that their pre-alpha technology preview of the MMORPG, PlaneShift, has exceeded 100,000 unique player accounts in less than six months.

PlaneShift is unique among the wave of upcoming Massively Multiplayer Online Role Playing Games (MMORPGs) because it is being built by a volunteer team of programmers, artists, musicians and gaming experts from around the world that share the same passion: building an RPG game with no boundaries. While commercial MMORPGs have constraints based on budgets and schedules, the PlaneShift team relies on a worldwide community of talented developers to expand their game endlessly. The current technology preview, codenamed “Molecular Blue” was released to test the base networking infrastructure and to give the community an indication of what is to come.