Fluid - Turn Your Favorite Web Apps into Real Mac Apps.

However, for $4.99, you can purchase a Fluid License which unlocks a few extra features:

  1. Create Fluid Apps with Separate Cookie Storage. (Preferences → Security → Cookie Storage)
  2. Pin Fluid Apps to the Mac OS X Status Bar. (Fluid App Menu → Pin to Status Bar…)
  3. Use Userscripts or Userstyles in your Fluid Apps. (Window → Userscripts)
  4. Use Lion Full Screen mode in your Fluid Apps. (View → Enter Full Screen)

Are you at all worried about Google's new policies to merge all your data? No? You should be. Yes? Then this may be a solution, at least to my Apple brethren.

The clincher here is to create a sandboxed app for facebook, or gmail or search or google reader. If you sandbox your browser cookies, the services cannot track you.

And for $5, it's a steal to protect your data from these "groups". Remember, if it's free, you're the product.

Update:

Here's a detailed write up from TUAW.