I recorded the poop out of a band saturday night. The soundman was incredibly helpful (fortunately). This band does not do soundchecks, a quirk, so I was using the opening bands to set levels and troubleshoot. We discovered: the board's direct outs were post-fader, and there did not seem to be a way to switch them. The sound-dude was familiar enough with the board to figure out how to route a couple of the mics that he didn't need much of to subgroups, so that he could keep them out of the PA, but I could still get signal. We then found a couple of bad channels, putting out as much fuzz as signal. Turned out to be the snake. The high tom mic never worked, but I didn't find out until later. It would record intermittant blasts of static, that I don't think had anything to do with the toms, but it looked like it was recording*. The 4050's in the Recorderman configuration caught the toms pretty well (I had to move them up to accomodate the drummer), so, as I expected, I really didn't need tom mics anyway.
I was also able to borrow a couple unused snake channels for my overheads, and the sound-guy enthusuastically accepted my offer to replace the 57's he had for kick and bass with my D6 and ATM25, respectively. We also pulled out my e609s for the lead guitar, which, in retrospect, wasn't a great idea, too fizzy. An SP B1 just in front of the board, about 8' up captured the room, and audience reaction.
Overall, I'm quite pleased with the results, based on a couple of quick listens, especially conidering there were about three points I was certain I would end up with nothing at all to work with.
I have a Multiface II and and Onyx 800r, so I can run 18 at once, up to 12 TR and/or 8 XLR (two channels on the Onyx will take XLR or TR).
*This is the real problem with live recording, IMO: monitoring. It is too loud an environment, even with loud cans over earplugs, to make any useful assessment of what you are tracking. This makes submixing, most noticably, extremely hazardous, as you are almost certain to end up with subpar to awful balance in the submixes. It's bad enough to have to heavilly EQ a wierd sounding track during mixing, but having one ridiculously loud tom, and no snare in the middle of a kit is awful.