Setup and configure a services stack, initial installation of a WordPress 3.0.4 MU (targeting 150 - 300 blogs later) and W3 Total Cache, implement initial site security (i.e., protected htaccess, WordPress Admin access by IP address whitelist) running on Nginix, and Amazon Services (EC2, S3, etc)
30 Days of followup support regarding setup configuration issues and/or performance tweaks required on issues not created by client.
Need is immediate.
Start work today.
If client is satisfied with installation and site responsiveness after 30 day evalaution, freelancer will also have 1st opportunity at project of migrating existing Wordpress site to the Amazon environment.