Google will launch a search engine for source code tonight, but journalists informed of the launch agreed to a press embargo until 9 PM.

The launch is part of a busy week for Google, which launched a literacy portal today, an experimental search site a few days ago, and a new version of Google Groups this week, and is about to open Google Gadgets to outside developers.

According to a journalist, Google's new product will launch already larger than the two main source code search engines, Koders and Krugle.