Yes on both accounts.
Akill ID has been requested on many, many occasions and was always shot down because it really doesn't serve a useful purpose. Referring to ID #35343824 is no different than referring to the nick that was akilled. it's no easier to reference, lookup or otherwise investigate. What I mean is that searching logs for a specific nick is just as easy as it is to lookup an ID. It's exactly the same amount of work. Having Akill ID's only looks more complex/cool/high tech/fancy/insert any other vanity term.
Web register and login are possible through a 3rd party module that is called XMLRPC but to my knowledge, it was never stable enough to release.