you're welcome
it's not always necessary to make things 'web ready'. mostly this is done as a courtesy for those with 56k dial-up so that they dont have to wait 15 minutes for a page to load (only 14)

i prefer not to cut resolutions, myself, or at least not by much. i used to post everything as a .bmp. then i started doing them as .gif's on sites where 56k'ers complained. and here on retouch, with the 100k limits, it's almost all .jpg's. so, it varies depending on the target audience and the site's limits and freedoms... and what you're posting, of course.
for a business site, i would guess it would matter what the business is. a photo business like retouching would pretty much demand higher resolutions.
Craig