Thus spake Mitar (mmitar@gmail.com):
The problem is that we will probably not be able to experiment much, what we will buy we will have. So I am hoping to get it right.
We are targeting a fully open exit node policy so some advice on how to arrange things with ISP would also be good. We have good experience with one local ISP, but not on this scale. So probably it would be good to request a SWIP and abuse handle to our e-mail? Anything else?
I recommend against the default exit policy in the US, especially if you do not want to have to do a lot of experimentation.
The community is drafting this policy as an alternative: https://trac.torproject.org/projects/tor/wiki/TheOnionRouter/ReducedExitPoli...
Your load characteristics will differ with this policy from default exits (extrainfo statistics tell us you will see around half as much traffic per tor process instance), so if you don't want to experiment, you should decide your exit policy early.
Again, in the US, it is pretty much a must to use the reduced policy. Even if content industry takes you to court, and you win (Tor-savvy US lawyers say you probably will), big content can and will change the law afterwords: http://news.cnet.com/8301-13578_3-20014468-38.html
Is there any software developed which would handle automatic abuse e-mails with automatic replies?
No. This would be great to have, though. For starter templates, see: https://trac.torproject.org/projects/tor/wiki/TheOnionRouter/TorAbuseTemplat...