While checking out my Yahoo! and Google Services, I came by the future Google (Online) Office and saw a major UI version.

They launched the new Google Docs & Spreadsheets UI version with the following new features:
Follow up:
Organize your documents with folders
Organize your documents with folders As your documents grow in number, we wanted to make it easier to manage and organize them by adding folders. Create a folder by clicking the “New” button in the upper left hand corner, select “Folder” and add the name of the folder. Now just drag and drop any document into it or add one document to multiple folders. Learn more
Easier invitations
You shared your concerns about the old invitation system: needing to invite everyone on a mailing list, or having problems inviting users who had multiple addresses and multiple Google Accounts. So we’ve simplified our invitations to work better in those cases.
Best of all, inviting people is as easy as ever.  Learn more
New keyboard shortcuts
We added a dozen new keyboard shortcuts to the editor to speed up common operations.  Learn more
Right to left text support
Right to left text support Now you can select either Left to Right or Right to Left directionality when typing in a document or spreadsheet cell. Users who wish to write in Hebrew or Arabic will find it much easier to compose documents in these languages.  Learn more
The new verison is neater, more “web 2.0″ like, and easier to use. I just hope the connection to their “Google Excel” server is now better, been experiencing frequest disconnections for the past months. But Google Document is working fine. I hope the next thing they will add is “Google Powerpoint”, a must!