Here’s another reason for me to justify an iPhone purchase – TripIt for the iPhone. I’ve blogged about TripIt previously and find it tremendously useful for organizing my itineraries as a traveling consultant. I’m still hobbling along with a Palm Treo 680 smartphone but am anxiously looking forward to a new iPhone model, which is rumored to be announced at the upcoming Apple WorldWide Developer’s Conference, beginning June 8, 2009.