Hey guys,
I started playing Riichi mahjong a couple of weeks ago, and have been practicing mostly on the site Japanese Mahjong - Flash Game playing against computers until my skill isn't at an embarrassingly low level. I found some resources to get better here, but I was wondering if there were any to work your way up from a complete beginner to someone of moderate skill.
thanks!

Play against humans online.  I use tenhou.net.  Another place y'can go: ron2.jp

For tenhou, at least, there are some English instructions on how to navigate the site.

For some really fast play, I have my iTouch (er iPod Touch) and play using the Nagomi Mahjong app.
App Store - MahJong Nagomi

There is also Jan Ryu Mon.
App Shopper: Janryumon PLUS (Games)
Unfortunately, this game isn't working on my iTouch.  Sadface.

If you're worried about getting to a point where you're confident, I advise that after you're comfortable with the CPU you play in the general room on Tenhou a bit as a "NoName", meaning don't register an account. This way you won't have stats or a record, and that's kind of for the better if you're starting out and you don't want to be discouraged by having to worry about that stuff.

There's really a shortage of English-language strategy online, as you might have noticed. If you dig in the reachmahjong or osamuko archives there's some good stuff, and I recommend this translation blog of a strategy blog by a super-strong player (Tenhou 8dan). A lot of straightforward advice from beginner to advanced levels.

Thanks for your replies!