The site says the GeForce 9800 GT Green Edition will be the continuation of the 9800 GT, this card is expected in mid-March. The Green Edition has lower clockspeeds but offers much lower power consumption.
The card will coexist with the GeForce GTS 240, which has core/shader/memory clock of 675/1688/2200MHz, compared with 600/1500/1800MHz found on 9800GT.
Another new part is the GeFroce GTS 250, that card will be a rebadged GeForce 9800 GTX+ without any changes, expect the name of course.