While the SanDisk site lists the 6GB at $99, clicking it does not lead to an ability to buy.
Back in late June there were announcements that SanDisk was releasing the 6GB to cell phone manufacturers for testing. Release to consumers is not supposed to be until later this year.
Oh well, I wasn't gonna buy one anyway. I am happy with my 4GB.
Also note that a SanDisk VP said:
"With these new cards, any mobile phone with a
compatible microSDHC slot will have just as much storage as the largest-capacity iPhone."
MicroSDHC folks. No such thing as a 4GB non-SDHC chip.
NEWS FLASH SanDisk 6GB & 8GB MicroSD Memory Cards