NVIDIA WILL continue to brand its chipset range Nforce but for Southbridge while two new boards will be named Geforce 6150 and Geforce 6100. We are talking about Northbridge as those integrated graphic chipsets will have Southbridge's as well branded as Nforce 400 family. Nvidia will make a huge mess with branding as I would newer thought that Geforce 6150 is the motherboard, what they where thinking? I know it's fast for integrated graphic and that Nvidia wanted to use it as its strong argument but Nforce 6150 name would be just fine.
Geforce 6150 and 6100 chipsets will have integrated core based on 6200TC design and will feature two pipelines graphic. According to Nvidia document seen by INQ faster Geforce 6150 "chipset" will support HD video, TV encoder and Dual head / TMDS outs. Will have high 6200TC based graphic and will run at fast clock, we still don’t know what that clock is. It will be able to support one PCIe 16X slot and two PCIe 1X slots. These boards will focus its marketing about video and HD capability and will offer component, DVI, S-Video and composite out including VGA as well.
Geforce 6100 chipset will just have 6200TC based core clocked at slower speed than 6150 but wont support any advanced features such as support HD video, TV encoder and Dual head / TMDS outs. It will support one PCIe 16X slot and one PCIe 1X and that’s it but will end up cheaper.
Generally Nforce 400 series Southbridge will offer support for 8 USB 2.0, four IDE drives, four SATA 3.0 GB/s drives, High definition audio based on AC97 and Native Gbit LAN support including firewall. Don't forget the support for up to five PCI slots.
There will be two chipset variations one called Nforce 430 and second Nforce 410.
Nforce 430 support Gbit networking including active armour firewall, 4 SATA drives Raid 0, 1, 0+1 and 5 and media shield. Nforce 410 supports 10 /100 LAN, no firewall, 2 SATA, Raid 1, 0 and media shield.
Expect to see reviews in early October but board should be shipping around that time as well. Nvidia won some OEM deals so you will be able to buy those chipsets in som upcoming machines.
As for naming I believe Nvidia will fool many of its customers in buying Geforce 6150 graphic card, especially in OEM or SI's machine but they will end up with integrated graphic in a Northbridge of a motherboard.
Hell I was thinknig about ditching my mobo and 2 6800's for a mobo w/ onboard just to free up some space in my case! 
lol
