The HTML5-style shields are the most practical options. They fit with other web technologies, and they don't try to obscure the name of the project like the logos in the first comment (Pointing arrows and "assembled" people? Really?).

Also, the "negative space" logo is incredibly slick, and I'd love to see it used on some project even though the HTML5-style shields are more practical for WASM.

Fogaccio's binary-inspired WA ligature looks really professional, too.

Yeah the Fogaccio one is one of the better ones. It also has the domain-specific benefit of working great as ASCII art. That's not usually a requirement of logos but it's a nice benefit here.

Fogaccio looks cool and high tech, but I personally like the retro arcadey, "8-bit" ideas, execution notwithstanding.

I like it when design has a real sense of personality, and having the logo be retrofuturistic would be cool :-)

There's a couple that are nice. A good logo doesn't just come from nowhere though. There's a lot of work that goes into all the really good logos you see.

Or so say highly paid logo design companies anyway...

We'll pick Logo McLogoface!!