OpenJDK vs Sun JDK Versions

[Keith Kowalczykowski]

Hi Everyone,

    I'm a little bit confused about the version numbering of openjdk 6 vs
the current JDK provided by Sun. Looking at an install of openjdk from
debian (lenny), it lists itself as:

java version "1.6.0_0"
OpenJDK  Runtime Environment (build 1.6.0_0-b11)

Now, if I'm reading this correctly, this is essentially "update 0" or the
initial release of the jdk. Therefore, I have two questions:

1) Am I reading this correctly? In the sun jdk, the _X would be the update
number, so I'm assuming this is update 0.

2) Assuming I'm reading this correctly, why aren't any of the updates in the
open JDK? 

Thanks in advance for you help.

    -Keith