Currently http://musicbrainz.org/report/PossibleCollaborations only seems to include artists containing an ampersand in their names, but "vs." and "feat." are other common linkers that should be checked for and that usually do not justify a separate artist entry.

"And" or "with" are common as well, but including them might be a bad idea because of the number of false positives this would yield.

If other linking words to check for come to mind, please add them to the discussion.