Do you mean this one
http://www1.euro.dell.com/content/pr...=uk&l=en&s=dhs
Yes it would do what you describe above. Personaly I dislike win ce handhelds and prefer Palm OS based machines - but the wifi ones are few and expensive at the moment (when will there be a T3 with built in wireless ? - my dream pda)
Another thing to remember with pda and wifi is that wifi hammers battery life.
(the 300mhz processor machine, stand alone + wifi comes in at 227 inc VAT and to be honest you will be v hard pushed to find a wifi able machine for under this,imo)