GlassFish 3.1 Logo Suggestions for @JavaOneConf

You know Sparky GlassFish? :) Yes. Of course you do. Beside having his own Facebook profile, there is the official GlassFish page on Facebook.
As seen today, the GlassFish team is searching for some new v3 or v3.1 logos. I don't know if this is going to be a contest. And I don't know, if I am the right one to contribute; but here is what came to my mind thinking about it. Hope, you like it.And @Oracle: Sorry for using the Logos without explicit permission. I think of this as a design study. If the GlassFish team picks one of them, I am shure they will have the permission. If this is not correct to anybody, let me know and I replace them :)
Comments and further ideas highly appreciated.

The idea here was to replace the tail fin with the 3. Works for me :)

I don't know if I like this one. But this is about catching lines. The 3 should support the dorsal fin and make it bigger.

Same idea as above without actually replacing the tail fin.

Another variant of adding the number to the tail fin.

This is a bit more straight forward one. The dots in the lower left are a braille representation of the numbers. I felt like I have to catch the open space there with something. 

And the last one. Also not one of my personal favorites. But it could work.