Hi
I was lying in bed yesterday trying to figure out which tone was the right one for cool/cold 凉 (liang) which I regularly mispronounce as 亮 (and vice versa).
I then thought how cool it would be if Skritter would help with that sort of differentiation practice. I was thinking along the lines of Skritter first checking which characters I've already learned which have identical Pinyin and where I get the tones all wrong. Then Skritter could import those words into a sort of cram mode where I could then just grind through them:) Additionally a timer might be fun and/or useful that then only gives you a few seconds (if that "award system" gets implemented, you could also run a few competitions with that sort of tool as in who gets the most without any mistakes without ever exceeding on the time limit).
Probably this sort of tool wouldn't be very high on the to-do list, but I thought I'd mention it.
David
PS For everyone now unsure which tone goes with which character in my first sentence, it's 凉 (liang2) and 亮 is liang4 :-)