I'm also about to get an ipod touch...
Since it really is just less than a month till the next revision, I would recommend on waiting, cuz only 40 dollars more from that refurbished, you will have a faster cpu, 2x the ram, and faster gpu, probably double the disk space, (and maybe a camera, and microphone? we'll see...)
I am fascinated with the Iphone so I'm gonna buy an Ipod as a test run till my verizon contract is up in a few months, then consider the Iphone on att's network.
If you absolutely cant wait, then I might recommend buying it now, then selling it on craigslist or something like that and buying the new one once it comes out...