Already this week, ’s Philip Michaels told you about the . (There’s still time to download the free iPad app, as the tournament continues through the weekend.) Michaels also brought news of updates to the —it incorporates your iOS calendar so you can see if flight times conflict with other items on your schedule. And our roundup of includes a look at the latest version of the MLB At Bat application.

Also, the week saw updates to old favorites like , , and —all of which were upgraded to take advantage of the new iPad’s Retina display. And adventure game upgraded from an iPhone-only app to a universal offering also compatible with the iPad.

Other new and updated apps that caught our eye this week:

: With the launch of the new iPad, developers have been busy upgrading their iOS apps to look great on the tablet’s Retina display. But Avatron Software’s update of its $10 app merits a special mention for one reason: It now lets you use your iOS device’s high-definition screen as a second display for your Mac. To take advantage of this, you need a Mac running OS X Lion and a Retina iOS device; turn on HiDPI mode on the Mac and desktop elements render at double resolution—which Avatron says has been meaningless until now, since Mac displays weren’t high-resolution enough to show the difference. The Retina display, developers say, “brings HiDPI to life.” Your iPad will help you see your desktop display like never before.

: With the advent of the new iPad’s Retina display, the wonderment at Apple’s last marquee feature—the iPhone 4S’s voice-activated Siri assistant—has diminished somewhat. But developers are still looking for new ways to utilize the iPhone’s voice-command capabilities. Enter the latest update to MoboTap’s free app. Shell out $1 for the Dolphin Sonar upgrade and you can navigate the Internet by talking to your phone. Shake the iPhone or press an onscreen button, and you can command the browser to search topics, bookmark websites, and share them on your social networks.