According to TG Daily, Nvidia will re-name all of its 55nm 9-series GPU's in an effort to further "simplify" its naming scheme. Meet and greet the G100-series.
Industry sources told TG Daily that while the 8000 series is being phased out, all 55 nm 9000-series GPUs will carry a G100-series name. By the end of 2008, Nvidia will be offering today’s 9000 series as G100, GT120, GT130, GT140 and GT150 models.
When the 2009 45 nm GPUs arrive, which seems to be the case around Q1 or Q2, Nvidia will have fully transitioned to the new branding structure: Enthusiast GPUs will be integrated into the GTX200-series, performance GPUs into the GT200-series, mainstream GPUs into the GS200-series and entry-level products into the G200-series. 
