Over the last few years I've taken occasional photos of public artwork in Singapore - both permanent pieces and temporary ones. (Pictured here is the excellent First Generation, by Chong Fah Cheong.) So I've created a photo set of those photos - haven't got many in it, admittedly, got to get down to scanning I guess. Any light you can throw on the artworks is welcome.
For a comprehensive database, check out Peter Schoppert's Public Art in Singapore site.
Great blog, BTW.