someone in the chainsaw thread told me that i'll burn up a new saw if i use it for a mill and that it's not worth it to go and spend a grand on a saw for a mill...they're made to run aint they
That may be the case for a cheap saw but is not correct for a brand name saw. As Justsaws says, milling will immediately void your warranty. I was lucky to pick up a never used 880 that was still under warranty but in Australia warranty cannot be transferred to another owner so I managed to get the seller to knock a bit more off the price and in the end I picked it up with a 60" B&C for just under half the RRP.
A brand new saw should be run in normally according to the manual and after that it can be used for milling provided it is run a tad rich so the max RPM is a few hundred RPM below what it is normally tuned for. That aside I also know someone that bought a brand new 660 and started milling with it immediately and it has survived just fine.