Writely.com had me see the light - I saw the Web 2.0 vision, bought a mac mini to execute it and never looked back since - it's been a brave new world! 
Google Spreadsheets
spreadsheets have come a LONG way - they used to be abymsmally slow 2 years ago and now they are quite functional and features are coming in at a rapid clip!
I recommend using spreadsheet for organizing requirements and/or table-oriented information.   I particularly can help anyone use a spreadsheet to help with decision making.
enhancement requests
    - AutoFilter function - very *simple* picklist method for querying
 
    - search box - umm...hello?!? this is Google!
 
    - automatically synchronizes document set/store offline (goes for "word" docs too) (can this be written via API?)
 
Articles