The Dominion expansion for EVE Online will arrive tomorrow, December 1st, after a lengthy downtime of roughly 19 hours (02:00 GMT/UTC to 21:00 GMT/UTC). Access to the EVE website and forums will be down for much of this time, as will the EVE API, but CCP Games has compiled a tome of Dominion patch notes to occupy at least some of that time. There's also a player discussion of the Dominion features and changes on the game's forums with some clarification on details from the CCP devs.
If reading through the full patch notes (10,000 words and climbing with updates) isn't really your thing, a few of the EVE bloggers have discussed the highlights of what's new in this expansion. Mynxee covers the good, the bad, and the comical in Dominion on her Life in Low Sec blog. We also recommend checking out Casiella's take on the Dominion patch notes over at the Ecliptic Rift blog. Casiella discusses the myriad features that haven't gotten much attention so far: voice fonts added to EVE Voice in chat channels; the in-game jukebox now using MP3s with playlist support; and how player actions for the Caldari race via factional warfare now impact the rival Gallente storyline missions.