The pieces are starting to come together for a web replacement for Excel.

Steve Rubel writes in Micro Persuasion about JotSpot Tracker:

JotSpot just hatched a new service called JotSpot Tracker that puts Excel spreadsheets on the Web for sharing with just a copy and a paste. Combine this baby with JotLive or Writely and not only are you this close from being liberated from Microsoft Office, but you gain very powerful collaboration features as well.

In addition, Confluence 2.0 allows you to paste in Excel tables and edit them using the WYSIWYG editor. Unlike JotSpot Tracker, Confluence does not yet support table sorting, but it’s not hard to imagine them adding these features.