I know there's some kind of spinoff from NM Aww-rats' group that plays slow chess but I don't remember the name. This might be it or it's another group entirely:
http://www.chess.com/groups/view/slow-live-chess-association
I'm sure if you joined DHLC and asked around on their forums, you could get a rundown on what's available.
I am currently a member of the Team 45/45 League on ICC and am on a team for the upcoming season (T65) which officially began today, June 2nd.
I'm wondering if there are any other leagues here on Chess.com besides your own DHLC 45/45 and 90/30 leagues. A league, a regular swiss style tournament, whatever the case may be ...I'm interested.
Thanks