We've come across what must be a fairly new site but one that has really captured our attention. It's called TurnPlay and it's simple, focused, and unique. This site has a lot of promise and we hope that it attracts its share of users. It is sure to appeal to the serious checker player.
TurnPlay is not a site for a casual head-to-head "pickup" game. It is instead a site which you can use to establish games with other players, who don't even have to be members themselves, and then engage in serious play backed by a game moderation system that works the way it ought to, including the use of correct PDN for moves.
In addition, the site allows for setup and play of an arbitrary position, something we have yet to see elsewhere.
Memberships are inexpensive at $20 per year although free guest memberships offer many of the important features, including unlimited play.
Check out the review and then check out the site. And if you like it, support them by joining.
Addendum
We did, by the way, also just now review another site which offers email turn-based play of something they believe to be checkers (although we beg to differ). We won't embarrass them, or us, by mentioning its name in The Maven, but the full review is here if you'd like to see for yourself.
Update
Missing screen shot images for about half a dozen sites on the review page have been restored as of 05 March 2005; our apologies for any inconvenience.