Check it out:

www.snaplist.com

I bought it for 1 year to try it out and I've found it to be pretty a pretty effective tool on the 650. My wife puts stuff on my lists (from any computer - home, work, whatever) and whenever I get the time/urge to make a run to the grocery store, Costco, whatever I have the "list."

I don't work for DataViz, btw, but I am pretty impressed with this company.