Google has added pivot tables to Docs' spreadsheets.
Pivot tables provide an efficient way to summarise large data sets and obtain alternative perspectives on it. You take the row and column (2D data) and add more dimensions that you can "pivot" around and view in different ways.The Docs blog works through an example and the data is provided as a template so that you can easily experimennt with it. It also has this explanatory video which demonstates that pivot table creation is quick and easy.
Pivot tables created using Microsoft Excel can't be uploaded into Google Docs yet - but as they are quick to create from the grid data that can be imported that shouldn't present a problem.
If you are contemplating getting involved in Bitcoin mining using a CPU or a GPU or even an ASIC, you need to see this report on how far it has gone. A secret facility mines Bitcoin using racks of liq [ ... ]
Microsoft has launched the Prime Challenge, asking you to use cloud computing to find "lost primes". If this idea appeals to you can get a free trial subscription of Windows Azure to create and access [ ... ]