I have been using 30ga .999 pure fine silver as my NR wire and it works great
You can get it at 1/2oz (100') .999 US Fine Silver 30 Gauge Round DS Wire - eBay (item 400174020403 end time Aug-14-11 09:20:04 PDT)
It's 100ft so it should last a good long while and allow you lots of experimental coils. I prefer the silver to nickel because it has even lower electrical resistance and higher chemical resistance and will not leech into any of our juices.
It's a little more expensive, but it's peace of mind for me because the wife like cinnamon juices and those are very highly reactive, but don't bother the silver at all.
Cool, thanks man