Microsoft debuted its own search engine technology today in a bid to challenge Google as the definitive search engine. Not available for primetime yet, the Microsoft search engine is only available via a test site. Some MSN.com users will find that the new engine is available via the existing search bar, but a full launch will not occur until early next year. Google "signaled that it is ready for a fight" and nearly doubled the number of pages users search via its site late Wednesday in response to Microsoft's soft launch today.