To celebrate the summer travel season. We’re offering 25% off the regular price of Knapsack our travel app for Mac.

But hurry, the offer is only good through August 31, 2011:

• Single License:$29.99 $39.99
• 5-Pack Family License: $44.99 $59.99

Purchase Knapsack app on the Mac App Store or direct from us.

Knapsack 2.2.2 is now available on the Mac App Store and direct from our online store.

This update fixes a bad undo bug that would leave things in an unpredictable state which could lead Knapsack to freeze up. It also fixes some memory leaks that would crop up while navigating through custom trip groups.

You can read all about the details in the release notes.

Knapsack 2.2 is now available on the Mac App Store and direct from our online store.

This new version gives you the option to add photographs and other images to activities in your itinerary. Photos are copied into your trip and displayed inline with the times, names, and descriptions of all the activities in the trip.

Printing trips has been improved to use a new cleaner layout that includes the new activity photos along with all location and trip photos.

Finally, with Knapsack 2.2, you no longer have to unschedule a trip to modify the number and order of days in your trip — even if the trip is sync’d with iCal.

You can read all about the details in the release notes.

Follow Knapsack on Twitter or Facebook.

We just submitted Knapsack 2.2 for review to the Mac App Store. Hopefully we won’t run into any snags and Knapsack will make it through quick and easy.

In the meantime, here’s a little peek at what’s coming in this update. Knapsack 2.2 adds support for Activity Photos. You can now add photos or other images to your trip activities along with locations and the trip summary.

Knapsack will copy the photo into your trip and will display it inline and include it when the trip is printed. Double-clicking on a photo will show you the full-sized image:

Look for the official release soon!