To answer all . . .
I bought mine from
http://www.kindredquilts.com and got it really quickly!
They come in colors -- black, white, green, pink and yellow
I only purchased the white.
The marks come off with water (before ironing) or you can erase them off with the eraser at the end of the pencil and yes, for once they really do erase off without fabric distortion -- at least with the white they did!
For marking my applique pieces I use a sandboard and the pencil really works well with it -- nice thin lines and the best is no sharpening!!
I "tested" it out on a cranberry red fabric -- lines came out!
I swear I'm the queen of trying out every fabric marker out there!