Condylostylus sp. (longicornis?)
(Longlegged Fly (nonspecific)) ♀.
Size: approx. 3-4 mm. Photo: 08/07/11, 1 pm.

This little fly is probably Condylostylus longicornis and belongs to the family of Longlegged Flies. To the eye it appears greenish golden with a strong metallic shine. The genus has 35 species in North America. Different species can be found together in very close vicinity. Both photos show females which are more difficult to identify than the (hairier) males. 

bug guide (this photo):
bug guide (small photo, 08/17/11 at 9 am):

Condylostylus mundus (Longlegged Fly (nonspecific)) ♂.
Size: approx. 5 mm. Photo: 08/25/11, 10 am.

This blue metallic fly is Condylostylus mundus. Only the males of this species have this striking blue color while the females have the generic green appearance. Both have unmarked wings and entirely black legs. This fly is common in Florida. 
bug guide (this photo):