Move Multiple WordPress sites to Multisite

Hello,

We are looking to move 4 independent wordpress websites into one multisite installation.

Follow this link for a full explanation of what we'd like: http://wordpress.org/support/topic/moving-multiple-wordpress-sites-to-multisite

We want it to be done in a way that it does not affect the usability of our current websites or the SEO ranking.

Furthermore, we shall provide the host wordpress account where all these accounts would be moved to.

Some of the sites are subdomains while others are subfolders. We intend to have the host wordpress account on a subdomain of our main website.

You would also be responsible for the domain name mapping.

If you are interested, and can provide a proposal of your plan, then we shall provide you with the list of sites... and work together to get this done.