Unfortunately nobody yet knows when 4.0 will be released, but from what I hear, a public Beta will soon be announced, and its supposed to be out "4th Quarter of 2004"
Its fairly stable in the Beta right now, so things are great.
You can purchase eOffice from http://www.eoffice.com
(or eAccess, as BBclub members get 5% off..)
Or, you can wait until 4.0, which has the abilities to open attachments, but we are uncertain if the option to edit office documents will come with the OS. We know read only copies can be opened.