Glitch, the cute browser MMO set inside the minds of giant monsters, is officially opening up to the public today at 10AM EST after a long beta period. The game is the work of Tiny Speck, a new company formed by Stewart Butterfield, Cal Henderson, Eric Costello, and Serguei Mourachov, four co-founders of Flickr. It's a free-to-play game with subscription and virtual currency options, both used for avatar customization items.

Speaking to me in a phone interview yesterday, Butterfield claimed that the game is playable in a casual style, but also accommodates players interested in a more intense experience. "We wanted to have enough depth to capture the imaginations of people who want to go deep," he said. "There are 1000-plus items and 90 skills."

Glitch has potential for emergent gameplay, which he compared to Eve Online, though he was quick to note that it's not as combat-oriented as Eve and more fun to actually play. For example, he related an anecdote from the beta, about players creatively using a "notes" system. "Early on, some of the richer players started a bank, with an alternative currency that was based on notes," Butterfield said."They just guaranteed the notes with their supply of in-game currency based on the timestamp and the person who created it."