Lead Addict brought over his 6mm Sci-Fi stuff and some rules he has been working on, for a play test. The forces were about equal, but different. As a group, we've been searching for a quick set of rules that gives you a feel for the period (or at least how we think it should feel). The closest for this scale, for me, has been Future War Commander. Robofire! is also fun, but I think operates on a different scale, and seems more fantasy Sci-Fi as opposed to hard SciFi.
I didn't get a true feel for this playtest as I was wiped out, almost immediately by artillery. But, that's what play tests are for. I'm sure lead Addict will have something on his blog about it today.