Is there a way to make fMobi or Sociality take over from the stock facebook app?

OR Qnuptunea taking over from the stock twitter app?

Such as opening up contacts facebook/twitter links OR when we click on something from the Feeds screen?

I would prefer fMobi to open up everything facebook related as it is just the most feature full facebook client we have for our phones ATM, although Sociality will most likely end up being the best when everything is finished!

This idea is similar to have a different default browser, possibility of a default facebook/twitter app to view tweets or friends statuses?