Here's my technique for poor man miniatures
1) Visit any website with game appropriate art work. for D&D i used
http://www.wizards.com/default.asp?x=dnd/arch/ag
2) Download every image you like or think you might need as a mini.
3) Use an image editing program like picasa to make the images 1 inch square
4) Print on to Heavyweight or card stock paper
5) Punch out with 1 inch hole punch
6) Glue to 1 inch washer.
7) Store in an empty plastic film container.
I have hundreds minis i created this way. They are cheap, last for years, great to take to conventions or other peoples houses, and perfect for large scale battles where you might need dozens of orcs or other monsters.