I've always loved Heads Up (HU) play. I remember freshman year of college I would always play heads up with my roommate for laundry money. Good times.
I recently started playing Heads Up matches on Full Tilt. They offer many different buyin HU matches. I've played three $20 and two $50 HU matches. I am profit $120 (I lost two of the $20 but I won both my $50 HU matches.) Obviously this does not say much about my HU ability because it is so few matches. I don't think I will stick with these as my main source of income, but HU is definitely a great way to spend a few hours when I am just not in the mood to play full ring games.
Finals are coming up so I do not know how much time I will have to play poker. This is the last week of classes and finals start next week. Wish me luck.