Andrew Crow offered a tip on using inline spreadsheets at Basecamp.
I thought this was a neat trick.This is an inline Google Doc Spreadsheet. It’s displayed with an iFrame. Nothing exciting, but it allows for editing by the client (assuming you give them the ability to edit the spreadsheet online). And is automatically updated. So, instead of doing the Textile table formatting (which looks fine, but is uneditable by anyone who’s not an Admin), this allows for possibly more interactive collaboration.
Here’s the code I used in the Basecamp Message:
<IFRAME width=450 frameborder=0 SRC="http://spreadsheets.google.com/yourspreadsheethere">Text for non-iFrame browsers</IFRAME>
Related: Google Docs and Spreadsheets