Facebook will launch a new webmail service on Monday that will offer every Facebook user an @facebook.com email address, if TechCrunch is to be believed. Rumors regarding Facebook’s secret Project Titan have earlier surfaced on numerous occasions; however, this time it might make an appearance for real.

With more than 500 million users, Facebook is larger than Yahoo! Mail, Hotmail and Gmail. Over the past few months, Facebook has beefed up its Photos and Events features, and launched a new location based check-in feature. It has already become an integral and indispensable part of life for millions around the world, and launching an email service will only strengthen Facebook’s grip.

Facebook’s growing dominance has earned it the ire of Google, who recently criticized the social network for trapping user’s personal information. If TechCrunch’s predictions regarding Facebook’s Monday event pans out, then Google better watch out. People might not need another webmail service, but if Facebook manages to integrate the new messaging system tightly with the main interface, it might find quite a few takers.