Yes! I use a Dell laptop for absolutely everything! Weather from
http://secure.metoffice.com/aviation/index.jsp is fine, also NOTAMs from
http://www.ais.org.uk as well as everything else from the Internet. I connect at home through a wireless router to Virgin.Net 1Mbps broadband and anywhere else through 802.11b wi-fi. Or, as a last resort, through a Vodafone Mobile Connnect GPRS PC card.
Also use GPRS on my Nokia 6310i for TAFs and METARs, or GSM to Heathrow FBU to file flight plans.