Kayak has also tweaked other parts of its website. A Toolbox section on the upper left now lets you share results with others. A small heart icon next to each result lets you tag them as favorites, making them extra prominent for recipients. The e-mailed link stays live for just 30 minutes, though Kayak's spokeswoman tells me that time limit may be extended. The collaboration tool is helpful when you're trying to coordinate flight schedules with friends, for instance.
In my meeting with Kayak last week, I also learned that the site plans to roll out an instant-messaging function, so you will soon be able to share your search results over IM as well.
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