I use to draft my trading strategies and keep my trading journals with Google docs and spreadsheet service. It just gets better. Now Google spreadsheet finally integrates charting service. I can plot my performance charts online. Though charting functions are still limited, it is good enough for keeping trading journal.
the company rolled out a new version of Spreadsheets today with charting and a few other worthwhile features. The free Web-based app is still more of a Spreadsheet Jr. than a full-bodied Excel rival, but it’s becoming more and more plausible as a real productivity tool, especially if collaboration is involved… full article here.
Anyways, make sure you always keep an offline copy of your online documents.