Facebook will be announcing its’ long awaited webmail project tomorrow rumored to be a Gmail killer. Whether it will truly be a Gmail killer remains to be seen, but having a 500 million plus user base doesn’t hurt when introducing any new product.

Compare that to Google’s almost 200 million Gmail users and there could be some real competition here. It will be interesting to see the features of Facebook’s webmail, particularly because Google’s growth in the small business and enterprise market continues to be steady. I recently ported all of my businesses communications platform including email and CRM to the cloud tying in Google apps, Gmail and Zoho CRM. Facebook email is rumored to have enterprise features = Facebook + Office Web Apps mash-up, known as Microsoft Docs. Remember when Microsoft purchased a 1.6% stake in Facebook? It appears a Gmail and apps war is brewing, a rather refreshing play for Microsoft compared to some of the company’s other choices. Microsoft will clearly try to leverage Facebook to help migrate its’ eroding personal computing software revenue to an online marketplace.

We’ll all be watching to see if the Facebook email features have legs enough to be a Gmail killer.