I jumped at the Google Spreadsheets launch (more here) and wanted to share my first impressions. It sure gets the closest to Excel that I’ve seen so far. I was incredibly impressed. The editing, formuals and sheets functionality is very well done. You can even change sheets with CTRL-PgDn like in Excel, although if you have mutliple tabs open in Firefox it will change the sheet in your spreadsheet and then change tabs (so if you want to use this feature, make sure you have your spreadsheet in a single tab instance of Firefox). The only thing that I couldn’t find that I use regulary in Excel, was autofill.
Google’s office suite is rounding into good form. I’m now using Gmail, Google Calendar, and Spreadsheets. I’m sure I’ll use writely as well when the need arises (currently just have one document in Writeboard in Basecamp’s free plan).