It's possible to fill a spreadsheet with values from a website.
I've recently connected a spreadsheet to a table of definitions
from a website. Anything that is organized on a table can be
imported into a spreadsheet and you can furthermore refine
the spreadsheet to update the values as they get updated on
website, provided the page is not a static page.
Also, it's possible to put a spreadsheet onto a website. You
don't need FrontPage to do this as you can save a spreadsheet
into an HTML format and then publish the HTML code to a
website. It will be viewable on systems that have Excel on them
though I think. I'm not sure that folks that don't have Office or
Excel installed will be able to view the code properly as from
what I've seen of the code, it contains references to Office.
You should be able to get it to work with some modifications
though, as tables are tables.
Not sure about which way you wanted to go but I hope I've
answered both questions satisfactorily for you.