Possible Duplicate:
Migrate shortlist based on tags?
Tag-dependent data-driven off-topic migration suggestions
The list of sites suggested via close
| off topic
is limited (for good reason), but does not always contain the appropriate SE site for the question. I think that e.g. if a question is tagged linux it should show SF, SU, and U+L, but not necessarily Sharepoint.SE unless other tags implied it.