I'll go ahead and try to answer as I have a nagging feeling that the InfoPath
newsgroup will say to come here....
As far as I know, InfoPath 2003 cannot create functional forms for display
in the browser. I believe you can save your form as an HTML form, but the
only thing that will do is display the controls (ie. checkboxes, radio
buttons, text areas, etc). It won't actually save or read data unless you
write some code (probably ASP) to make it work, and even then it would be
tricky to recreate the functionality of InfoPath. InfoPath 2007 is supposed
to support browser-based forms, but it has yet to be released for general
consumption.