Warning: do NOT get CyberStyle from RPGNow. It is pre-d20 Modern.
Somalia and Colombia d20 are both d20 Modern. Holistic-Design also made Afghanistan d20, but that is NOT d20 Modern.
Holistic-Design has also released Rapture, which looks promising, but I haven't picked it up yet.
There'll be a slew of more material, from the looks of things.