  We study the implications of interpreting the recent muon g-2 deviation from
the Standard Model prediction as evidence for virtual superpartners, with very
general calculations that include effects of phases and are consistent with all
relevant constraints. The most important result is that there are upper limits
on masses: at least one superpartner mass is below about 350 GeV (for the
theoretically preferred value of tan(beta)=35) and may be produced at the
Fermilab Tevatron in the upcoming run, and there must be chargino, neutralino,
and slepton masses below about 600 GeV. In addition, tan(beta) must be larger
than about 8.
