Configure Magento Multisite & Performance Recommendations

I am looking for a Magento Expert to configure a clean multi site configuration to handle 2 domains (with the option for possibly more domains in the future). I need someone that has done several time before and understands the structure and can explain and help me with questions the I may have. I need someone with excellent communication via Gtalk or Skype. I may need additional support in the future. (main project request) the second part of this project is to recommend some options to speed up the performance of the Magento cart. Currently i have a new 1.5 installation, on a new dedicated server with some light extensions installed. The theme has been slightly modified. i will be using a CDN. I have no performance extensions but i am considering it and would like recommendations from an expert that understands Magento performance. (minor part of the project) I will award the project to whomever displays an expert knowledge and experience with the addressing these requests. I need this completed ASAP.