So far,
* VLC - for videos
* Skype
* Transmission - for torrents
* Gimp or Seashore - editing pics (Had GIMP in Ubuntu, but the more simple Seashore may be enough as well.)
* Audacity - editing audio
* Firefox - in case I need an alternative to Safari, or if i want to use its addons.
Plugins for Safari:
* ClicktoPlugin - Don't have to bother with any plugins, unless you want to. A neat design which fits Safari style very well.
* Adobe Flash - I wouldn't if i hadn't clicktoplugin.
* JavaScriptBlocker - a small button in the corner helps a lot.
Online alternatives:
* Haven't installed NeoOffice or MS Office, cos I thought in case i need to view a file, I would use Google Docs instead.
* If you rarely need to edit pics, pixlr.com looks like it could be a good alternative to GIMP/Seashore. I think you can also download it.
* Have Ubuntu One, Dropbox and Google Drive apps but I prefer their web pages as well, cos I don't want to sync.
I'm trying to keep it minimal as possible, just because i thinks less apps=less problem possibilities. Has been only a week though with the new air, so i'll be looking for more app ideas later.