The discussion of Hex has been monopolizing the last couple pages of the Kickstarter thread, so I'm giving it its own home, since it's clear that: A) The Kickstarter has more than succeeded, being at 160% of its goal with 23 days still to go; and B) We have a critical mass of interested players here who are going to be interested in talking about it for a while to come.
For anyone who missed the announcement, Hex is a new online TCG from Cryptozoic, the company behind the successful World of Warcraft TCG. Mechanically, it looks to be closely modeled on Magic, but with some interesting differences in the resource system and other mechanics and a heavy dose of cards that are only possible in the digital realm. In addition to strong plans for PvP play (24/7 tournament availability, with an emphasis on drafts), it is slated to have a whole RPG/MMO side, with leveling up, dungeons, loot, factions, crafting, raids, and a parallel card set, among other features. It is free to play, and they've stated that the only things they plan to sell are booster packs ($2 each) and tournament entry fees ($1), meaning that it should be possible to play the entire PvE content for free.
For anyone on the fence, the Kickstarter rewards are extremely generous relative to the cost of packs after the game launches, with the biggest highlight being the Pro Player tier, which offers a free draft tournament entry (normally $7 including three boosters) every week for life.