I am surprised at the fact that another company has come up with an on-line spreadsheet application. The newest entry into this is Xcellery.
At first glance it would seem that it is kind every other company but they have capitalized on something that I have not seen anywhere else.
With Xcellery you have the ability to edit on-line sheets in real time in Excel. Pretty cool.
I will give it a try and post my findings.