It's pretty slick!
A little searching with google turned up a perfect xinetd.d config. In theory you could use ssh with a forced command in your authroized_keys file and specify the select identity to run hotwayd remotely.
I however decided to install it locally for Mac OS X Mail to use as a pop account. The only short-comming I find is no support for IMAP. It might also be nice for it to see if it's running from a terminal or a socket, and use STDERR to notify the user they might want usage help.
At any rate, thanks for providing it. It'll save me from hotmail's hideous webmail interface! yippie!
Re: multi-threaded scanning suggestion
Did I mention I found hummingbird? It does what I'm after. Take a look at it.
Thanks again :)