I haven't read any MC2 stuff in probably close to 8 years, but I got the first few Spider-Girl digests at Wizard World for a couple bucks each because I remembered really liking it. And it's still awesome. So far I've bought the first four Spider-Girls, and the first J2 and A-Next ones. I know the Last _ Standing minis and Amazing Spider-Girl are in regular-sized trades, but I hope they'll reprint them digest-sized when the time comes. Also, I hope they finish off the J2 and A-Next series.
This is a great little sub-universe and the Ultimate Universe could've learned a lot from it.