For those of you who like to use spreadsheets to track reloading data (i certainly do), you should check out google spreadsheets. (docs.google.com)
There is a spreadsheet, word editor, etc. i mostly use the spreadsheet. Excel certainly is more powerful, but google spreadsheets still has all of the built in functions that we all use for shooting like STDEV, AVG, etc. The nice thing is all of the spreadsheets are saved by google so you can access them from any computer with an internet connections.
And even better is you can share the spreadsheets with friends, set access levels (write, read only, private, public, etc) which makes it very easy and safe to share shooting logs/results with everybody here on LRH.
Google also just came out with a new feature called "Drive". You can get 5GB of free storage to save any file you want. I save all of my various targets (pdf format), all of my reloading data spreadsheets, and other documents related to shooting. And if you don't want to use google spreadsheets, you can use Drive to store all of your excel files and set sharing permissions with those as well.