as]var myBigAssCanvas:BigAssCanvas = new BigAssCanvas(10000, 10000, true, 0xff000000);
addChild(myBigAssCanvas);[/as]

draw 每 works exactly like BitmapData.draw, including the matrix, colorTransform, blendMode, clipRect and smoothing. You＊ll never know you aren＊t just drawing to a BitmapData. 
dispose 每 removes all bitmaps from display list and disposes of all bitmapdatas. 
fillRect 每 rect, color. 
getPixel, setPixel, getPixel32, setPixel32 每 all just like in BitmapData. 
noise 每 yup. 
perlinNoise 每 everything except for stitch, which I don＊t know if it can ever be made to work, and offsets, which could be made to work with some effort, I believe. (This one can be pretty slow for a large canvas, by the way.) 
lock, and unlock, minus the changeRect stuff in unlock, which I never knew existed til tonite.