I was lucky enough to accepted into the StarCraft 2 beta. I've earned a few achievements from normal game play. Some of the achievements are a bit harder to earn and will take effort. If those achievements aren't going to carry into the version being released on July 27th I won't bother. So is there information anywhere about whether or not achievements earned in the StarCraft 2 beta will carry into the retail version?
All achievements will be wiped upon release. It's beta - meaning it's there for testing, not for boosting your achievements before the game is even released.
The only achievement (or Feat of Strength) you'll probably get is that your participated in beta.
Source: Battle.net forums
Blizzard wiped previous beta accounts in StarCraft 2 so I don't think that's going to happen.
Moreover, they never preserved WoW beta achievements or gave a WoW feat of strenght for being in a expansion beta.