Google has added new features to its experimental Google Spreadsheets. The application preloads your Gmail contacts, so if you want to invite someone, the autocomplete helps you do that faster. You can now make public spreadsheets, that are visible to anyone who has a Google Account (read-only access).
If you want to show spreadsheets to people without specifically inviting them to edit or view, click "Show Sharing Options" to open the sharing options area. Check the "Let anyone view" option.
After you've selected this option, the URL of the current spreadsheet will be shown directly in the sharing options area. You can email or IM this URL to people or post it as a link on a web page. These URLs are also a bit shorter and easier to copy and paste than in previous versions.
Google has two new export formats: PDF and Open Document Format (ODS). There's also a print option available in the File menu.
The limit for imported files is now 1 MB for XLS and ODS files, and the maximum number of people that can simultaneously edit a spreadsheet increased to 50.
While it's good to see that Google updates Google Spreadsheets, I can't help notice there are still no charts and this new version is much less stable (it crashed IE and Firefox often).