The new editable list view for spreadsheets is available for iPhone, T-Mobile G1 and Nokia S60 phones, that is for mobile phones that have WebKit-based browsers.
Screenshot from Firefox with an iPhone user-agent.
Tip: If you like the list view, there's an easy way to enable it for any spreadsheet, even if you're using a desktop browser. Just replace
http://spreadsheets.google.com/ccc?key=ID
with
http://spreadsheets.google.com/lv?key=ID .
{ Thanks, Daniel. }