if it makes you feel better...
If it makes you feel better I'm about to purchase a 60GB 5G iPod, knowing full well that a "ultra widescreen video bluetooth iPod / toaster" may be right around the corner. Why? I like the 5G, they work perfectly, and they've been in the market and the bugs are pretty much worked out.
My logic is enjoy your iPod, if you always sit around with the philosophy that "something" might be coming out soon and hold off your purchase, you'll never have a new iPod or Mac ever again because "something" will always be around the corner. Buy what you want and enjoy it now instead of chasing ghosts of what might come.