Before you go jumping on that 1GB CF card, know that Sandisk products have proven to be troublesome to many including myself; a quick net search reveals mostly medicore reviews at best. For example, I "killed" two Sandisk 256MB SD cards by simply dragging MP3 files to them from Windows Explorer like I would to any of my other 5 flash cards. Sandisk claimed that my system bus was too fast for the cards (wow, a
blazing 133Mhz?

). The Sandisk 256MB CF-1 card I had before that claimed a burst write-rate of 2MB/sec, but in actuality was closer to 500KB/sec (if even). That thing took
forever to fill up. You are better off spending a little more on a Lexar or similar-make card. Go for something marked 24x or higher, otherwise you will grow old trying to drop files to the card (as I did with my Nex II). If you don't mind (greatly) decreased battery life, go for a microdrive......the 1GB ones frequently go for $179 on eBay. The main difference is in current consumption...microdrives draw ~250mAh while some CF cards draw a fourth of that.
One more point...while the Nex II/e is a nice player, you might also want to check out the slightly larger eDigital MXP 100. It can run a microdrive for 12h/charge (or CF for 30), has voice navigation, and can be found new on eBay for $49.