My dream knitting program for my PDA...

would be able to file single patterns, magazines, books etc., keep track of the yarn, and have a cross-reference feature that would be able to take "I have x amount of this yarn which has a yardage of z/50 gram" and suggest patterns to me that I already own (in single, magazine or book form) that would use up the yarn, rather than having to hunt through what I own every single time, or be reliant on what books the LYS currently has in stock.

Wonder if some sort of variant on the LibraryThing idea would be possible as well (i.e. a big database of yarn requirements for various patterns...)

(x-posted to <"ljuser"=knitting>