There's also a
Dominions 3 IRC Channel. It's not quite as easy to get a game now as it was a month or two ago, but it's still a good place to ask for advice, as long as you remember that these strategies were usually formed by playing "blitz" games. The premise of these games is killing your neighbour as quickly as possible, preferably before turn 10, and then killing all the other players as quickly as possible, preferably before turn 30. In blitz games, there's no space for flashy strategies, or even "okay" or "good" strategies. If you ask for advice, you're going to be given a strategy so optimized you won't realize it's for the same game!