What software and/or language to use to take Math lecture notes? I have a terrible hand-writing and I'm very good at typing, so I had an idea about taking my math lecture notes using a computer.
I've tried using a simple syntax (using purely ASCII) but it's getting harder and harder, so I need something a bit more sophisticated.
Friend suggested Latex, but said that I probably won't be able to write it fast enough to use it in "real-time". It also has a quite learning curve.
I'm on Mac os X. What would you suggest?

I personally only take math lecture notes in $\LaTeX$; there are several benefits to doing this and I don't think it's as hard to learn as you think it is.  I certainly don't have a problem with keeping up with lecturers.  See this blog post and some of the answers at this MO question.
