Wordpress and PHP tuning

I have a Wordpress blog running on a Linux VPS.

Visits are modest (150 uniques per day) but I\'ve just had to upgrade the server because of memory problems. Preparing for big push that will likely bring 1,000+ uniques per day. I want to get everything nailed down so that the site is running as efficiently as possible.

ATM it\'s pretty fast but when the memory runs out the server kills the HTTPD service :(

I\'d need somebody to check all code, check plugins, tweak Javascript etc for minimum server load from users. Caching is installed and you\'d need to double check that. Possibly implement S3 CDN.

I want an ultra fast site with no problems. If you think it\'s necessary then quote for ongoing maintenance (couple of hours a month?) to keep everything sweet.

I have no idea how long this would take - I have some techie knowledge but PHP/Apache is beyond me. I\'ve put a guideline budget but I guess this is negotiable.

You can check the site at www.PeopleByRyan.com