Looks like there is a gt440 after all. its going to be in between the gt430 and gts450 in terms of performance and price.
'Nvidia GeForce GT 440 features 144 stream processors operating at 1189MHz as well as 192-bit memory controller that connects memory operating at up to 1800MHz frequency. The novelty works at 594MHz. Naturally, the new graphics board supports all modern video technologies, including decoding of various contemporary formats, such as Blu-ray 3D (MPEG4-MVC). The new device consumes up to 56W of power.'
Only problem I can see is that they are aiming it at OEMs.
'Given that the novelty is aimed at OEMs only at present, its exact price remains unknown. It is highly likely that the GeForce GT 440 costs less than $100.'