I must make a website that permit customers to createOrincorporate their wordpress account to their account during my website. So, they are able to manage their blog from the website. Is it feasible?

I already have an online prescence running with customers, but I'd rather not produce a blogging system. This is exactly why I am thinking if wordpress can help.

By WordPress 3., you be capable of produce a network of websites (Multisite). This information is instructions for developing a network. It's very much like creating your very own version of wordpress.com. -- codex.wordpress.org/Create_A_Network

Possibly?

It may sound in my experience like you would like to take advantage from the WordPress API inside your website:

http://codex.wordpress.org/WordPress_API%27s

HTH