Thank you for the Peter Todd and Greg Maxwell citations!
Are there any more core developers with a position either positive or negative on Monero?
Not a 'position' per se but Wladimir did make a small pull request against Monero recently, indicating that he's at least looking at the code. I don't expect that to be the case for too many other coins:
https://github.com/monero-project/bitmonero/pull/329Nice catch!
Have any other alts been graced with pull reqs from BTC core devs? Maybe namecoin, back in the ancient times? Oh, and obviously VIA (PTodd's chocolate factory).