New nvidia card options at Dell?

I'm considering buying the 410n. The only component I'm not happy with is the 256MB nVidia Geforce 7300LE TurboCache card. However, I noticed at the Dell Wiki, they suggest the 8600GTS and 8800GTX cards are also available. These options don't show up at Dell.com. Anyone know what the scoop is? Is this a future option?
Thx!