I've been playing poker semi-professionally for 3 years (I'm a student). I started playing live poker and 5-max on Pacific then switched to stars and FTP after Pacific booted Americans. I played 6-max cash for a bit then switched to HU in September. I moved up fairly quickly into the $100s and $200s and happily grinded those for a while. I currently multitable the $330s - $1100s as my main games and play everything up through the $5500s.
I've coached since around October of 2007 and had solid results. I think that HU players have a wider variety of leaks than any other game so what I do in each lesson is dependent on the student. For players who are fairly inexperienced with HU I typically try to build their playstyle from the ground up. For players who have been around for a while but are struggling I figure out their leaks then help them understand what why it is a problem and explain how to fix it.
Below is a screenshot of my stats below the $5ks (I've lost in the $5ks so far over a small sample), divided by game type:

Coaching: How we approach the actual coaching session is dependent on what we agree you need as a player. Typically we will use Teamviewer so I can see your cards and you will play games at a level you are comfortable with. I will spectate your games and identify flaws in your play. I will make note of problematic hands and we will go over them between matches. As a bonus to the actual session, I am available by IM regularly. Pricing for coaching is $350/hour.
Hand History Reviews: This is pretty simple. You send me a hand history, I go over it and fill it in with comments. I find spots where you could have taken a better line and explain why. I also explain other situations where the same line might be useful. I am not currently doing hand history reviews.