retrolefty:
There is no fundemental advantage/disadvantage of pull-ups Vs pull-down, it's just whatever is easier to interface what your wiring to.
I'm just wondering if it's a bad idea to have a 1k pulldown, because the tutorials I've read mention 10k as the norm, and I think one said to have them between 4.7k and 100k.
You have a link to that?
it's just a keyboard matrix, same idea as http://highlyliquid.com/blog/up/keyboard-matrix.jpg
I'm using a board from an old casio and I don't want to re-solder 48 diodes unless I really have to 
