Ahem. Beat you by a mile (or 173 days):

http://news.ycombinator.com/item?id=3085082

In case anyone is wondering: http://en.wikipedia.org/wiki/Considered_harmful

That's a slow mile!

Or they can label versions like sun, so that nobody will know for sure if they're using Go 2 or Go 1.2 or Go Enterprise Edition or Go Standard...

Go 4.1.1 will now be rebranded 'Golaris 1.0'

Golaris has a nice ring to it actually... Rolls of the tongue a bit - however sounds more like an ailment.

"Oh, I got the golaris! better get an ointment for this"

You mean an app ointment ?

Reditardation (no offense please - just trying to make a pun in a non-native tongue :-) )

Or they could label versions like LaTeX, using a mathematical constant's decimal places.

For root 2: Version 1, Version 1.4, Version 1.41, etc.

As a bonus though, when they hit "Go version 4" they can say "Go 4" and it sounds like "gopher".

for those unaware: the mascot of Go is a gopher.

The New Go should do.