I was randomly trawling the net, and came across a Space Marine pic. It was meant for use in some computer based game, but I thought it would be ideal for playtesting marine armies - a bit like the core rules training pdfs that Spec Games had. It's similar, but has more units.
And in case it gets resized by the boards, here's a direct link:
www.grey-army.co.uk/SpaceMarines.gif
You'd have to do a little playing in a paint program to sort them into units, though. If I get time, I might do that myself.
Regards,
Reaver