i've been using the website name and then the date for the file name. if there's multiple files on the same date then i append a, b, c, etc.
so, for instance: Comes Forth In The Thaw 12.02.2011 or CFITT 12.02.2011b.... you get the idea.
i put them in a misc subfolder inside of my trent reznor and atticus ross folder so no need to bloat the file names more with artists' names.
EDIT: oops, didn't really answer the question... as far as track names in the tags it's relatively the same only i use /'s instead of .'s