web interface for excel

hi all

i'm wondering if anyone has come across a "web interface" for an excel
document.

not to change/write anything to the workbook - but read only, and only
certain sheets/ranges.

any thoughts/suggestions?
(i thought about saving as a web page - but i could just as well e-mail the
workbook to the person, which defeats the purpose of them being able to look
at "live" data at any point in time (they are 6 hrs ahead of our office)

tia!

J