PHP coder required for on-going work

This request for a coder is on behalf of a friend.

I am looking for a competent coder who has experience with coding PHP in OOP style. The base of the system should be coded with features such as login, register, friends, profiles, etcetera... as an example. This can then be extended onto with various other features at a later date. Furthermore, I'd like to be able to discuss over MSN these intended features before they are implemented. I would like to be quoted fixed prices for any additions, so for instance, profiles for $75 and this be added onto the pre-existant base. You must also be able to code my design into XHTML as an added bonus.