If you're supporting any users of Tosh laptops, the site is well worth adding to your bookmarks. A natural-text search engine on Dell's Web site, that answers your PC questions. And the answers aren't limited to Dell kit, either. If you're looking to protect important machines against power cuts, at least for long enough to shut them down properly, this will answer your questions and point you at some possible products. Top Web Sites Reviewed This month, PC World magazine has reviews of some of its most highly recommended Web sites for IT professionals.
Full details are, naturally, on the magazine's own site.
The Killer App site will almost certainly help you find it. If you're thinking about Internet Telephony you'll need some Internet phones, either as hardware or in software form. There are a couple of sites that have them. Our pick of the best of the world's IT press articles. Network Magazine's January edition explains this very well - worthwhile reading for all network support staff.