If you'll look into WebOS and the app catalog a bit more you'll find answers to several of those:

1. Youtube: Try out Leanback, the TV interface: http://www.youtube.com/leanback

3. Facebook: https://www.facebook.com/apps/application.php?id=4620273157

4. Skype: Native support in synergy (system accounts) and messaging app. Review: http://www.webosroundup.com/2011/06/hp-touchpad-video-callin...

6. Yahoo Messenger: Native support in synergy (system accounts) and messaging app.

8. DropBox - native support in synergy (system accounts) also: https://developer.palm.com/appredirect/?packageid=com.dogood...