For those lucky enough to receive an invitation and be admitted to the Google “playground for adventurous Google users*” to “try out Google Spreadsheets,”
Google Spreadsheets is a limited test. If you fill in your email address below, we'll send you an invitation - first-come, first-served
I recommend a spreadsheet tracking usage of Google’s previously released “wild and crazy ideas*.” Data for spreadsheet input can be found at Hitwise “Rankings of Top 20 Google Domains for the Week Ending 5/13/06”.
*As per Google Labs faq