Fear that one will not be able to get a new gadget on it's launch date. User will research all day to find out when a particular item is going to launch, go to secret meetings and email all of his friends to get even more info and has to be the first to have said gadget.
HTC Magic due to launch soon - gotta have it. iPhone v4? set to launch in June 2009 (so I've read anyway) - gotta have it. It's got a new shiny chrome button. This all leads to Launchitis. Look for bloodshot eyes, crampt mouse hands, nervousness, darting eyes, fast breathing.