Web browser email versus client email

[rob@xxxxxxxxx]

My wife wants to set up a different email account for her laptop than our 
desktop.  I am wavering between using one of the freebie web based email 
accounts:  Hotmail, Yahoo mail, Google mail; and between something that 
supports using the mail client that came with Vista.  She likes being able 
to do the Send/Receive and work offline although, with wireless in the 
home I don't know how often that will be necessary.  She's going back to 
college starting today, and, may take the laptop to some scrapbooking 
events.

I am assuming that the web based ones probably don't have the ability to 
interface with that mail client because then it would be hard to subsidize 
the free part, eh?  Am I wrong?  If so, how do I set it up?

I am checking with our ISP to see how much it would cost, if anything, to 
add an additional email account.

Any pro's/con's I should be concerned with regarding either client?

Rob Berendt