Can Yahoo use open source to close Google gap?

Open source is always friend to the No. 2 player in a market and always the enemy of the top dog.

That appears to be the big lesson after connecting a few dots on various items popping up around the Web.

First David Carr at Baseline notes that Yahoo is a major sponsor of Hadoop, a big open source project designed to replicate Google’s techniques for storing and processing information.

Carr documents how Yahoo has become increasingly cozy with Hadoop and has even swapped a few employees.