For an interesting take on Hawaii Hous. Auth. v. Midkiff, 467 U.S. 229 (1984) (the pre-Kelo case that equated the Public Use Clause with the police power) check out Professor Gideon Kanner’s summary of the case in his recent post “Say ‘Aloha’ to Your House, Then Say ‘Sayonara‘”.
More on Midkiff and related cases here and here.