500px: 500px is like Flickr, if Flickr filtered all the crappy photos that the bulk of their users sometimes post and distilled it into true art photography. So it's a place where really good photographers can store their pictures in polished portfolios for other really good photographers (or just other people) to see them. It's an elite social network for photogs, basically. The iPad app is an extension of their web site, you can browse popular pictures, see editors picks, new pictures, your pictures, your friends pictures and your favorites too.
SoundCloud: SoundCloud has been available on the iPhone for awhile now, but this new version has been repackaged as a universal, iPad-friendly build that behaves more like a streaming music player. A streaming music player that works with AirPlay. New tracks come through in a Twitter-like feed, which is populated by accounts you follow. This could be a favorite artist or label, a blog or magazine, or just a friend and a lot more. It looks perfect for a Saturday spent on the couch catching up with all the tracks I bookmarked throughout the week.
DirecTV: Hooray! DirecTV just updated its iPad app with the ability to stream live TV. You have to be connected to the same network as your DirecTV Plus HD DVR but that's okay cause it turns your iPad into another TV. The channels you can watch with the DirecTV app are actually pretty great too.
Bloomberg TV: Bloomberg is now streaming Live TV with their Bloomberg TV app. And it's completely free! The app will stream live TV 24 hours a day and have on-demand content like Game Changers and TechStars and interviews and more. On top of that, you can even download videos to watch offline.
Subtext: Subtext is a social community for e-book readers. Why do you need that? Well, people love to join book clubs, don't they? Subtext offers a lot of extra information about the book too, like commentary from your friends or from the author of the book or from experts, and they're all within the pages of the book. How convenient! So whenever you come across something interesting, there'll be more things to learn about in the margins. It's like interactive footnotes-comments, notes, questions, polls, links-that let you learn more than just what's on the page
You can keep up with Casey Chan, the author of this post, on Twitter or Facebook.