Looks like @Portfolio is digging the GCal/hipmunk integration! (Thanks!)

Today however, Hipmunk just took a burst of wind beneath its furry little wings (arms). The search engine, which already hosted such features as an “Agony” search filter, allowing you to search for the best possible combination of price, duration, and number of stops, can now dialogue directly with your personal calendar to ensure there are no conflicts. Better yet, by clicking the “Conflict” button, you won’t even see the flights conflicting with existing events.

Because you deserve the best hotel & flight search!