Most of those are of a larger tier, and without medics the stimmed marines seem in trouble. I can imagine ten roaches coming across 20 marines and successfully winning without losses if the roach player moves 'em back to heal.

aw man, im looking forward to playing as zerg when SC2 comes out. I'll have a good couple hours of fun just playing around with all the new units and finding out new killer strategies lol. So far, everything Blizzard has come up with for the new game looks promising

Someone really needs to ask about Blizzard's stance on SCII and the modding community(unless this has already occured, in which case, links plz).