As an aside, saving flat areas of color, usually found in logos, as jpegs is a very, very bad idea. Use pdf instead and retain the vector graphics, if you must go to bitmap then use tiff.
I've got to disagree slightly here. I think choice of bitmapped graphics format depends on the end-user and their intent for the document. If your documents use only tiffs, they will get very large very quickly.
If the transmission-method of the document is to be emailed around, and print quality is an unimportant or secondary consideration, JPGs are the way to go - not tiffs. You will have smaller files that are easier to send out and receive and you will reach more of your audience with respectable graphics.
If however print quality and graphics brilliance is of primary importance, and file size is less important, then tiffs and pngs are the better choice for bitmapped graphics.
Since I email many documents to clients, it's very important to have smaller docs. Otherwise many mail programs will kick them back to the sender!!