Please note that this breaks compatibility with node v0.4. If we're going to take this patch, I would propose creating maintenance branch v0.2, merging this pull request into master, bumping master's version to v0.3.0 and moving on with development.
[refactor v0.6] Refactor `net` module
* monkey-patch `_listen2` instead of `_doListen`
* get rid of `process.binding('net')`, it was removed
* remove part responsible for getting dummy file descriptor