Just thought I should bring this up since it's new. They took away the HUSNG's at Betonline a couple of months ago and have now, due to overwhelming demand, brought them back and made them better than ever. Heads up poker on that network with the odds calc + DriveHUD is absolutely sick. Anyone into such things should definitely take a look.
The new odds calculator, which doubles as a relatively decent HUD, can be downloaded off of BetOnline's poker site. As said, this + DriveHUD is gorgeous on that network. Of course, if you're RestOfWorld, you have access to all sorts of such things but for American players, this is a nice addition to what we currently have available to us.