Ajax posts filter and ajaxed pagination for a Wordpress Blog

Hello candidates, I am looking for a coder with WORDPRESS and AJAX experience to develop a posts filter for my WORDPRESS site. This blog have a lot of categories and basically 3 types of contents, cool sites, cool videos and design schools. I attach some screenshoots so you can see what I need to implement, you don't have to be worried for the design I need only the functionality and I'll do the rest. Please check out c*r*e*a*t*i*u*.com to see/compare what I have now and what I need. Some things you should know: - The categories displayed inside the layer should be loaded via ajax when users click on "select categories" (we can display a spinner when they are being loaded). - The categories displayed vary depending of the section you are viewing (check out the screenshots, there are in total 4 cases). - Crossbrowsing: Should work fine with Firefox and Safari, the 98% of our users use this browsers. - Only categories with posts should be loaded. - The search results should be updated instantly, except when you are selecting categories, here the users must click on "Apply". - The amount of selected categories should be displayed near the "Select Categories" link. - "Newer to Older" function required (and vice-versa). - Function to Select/Unselect all categories requiered. - Minimum 1 category selected is required (alert). - The search results should work well with the paginator plugin we are using, but the pagination must be done without reloading the page and scolling-up where the search results begin everytime we paginate. If your bid is not too high I offer you the chance to become a sponsor of our site for two months free of charge (currently +43.000 unique visitors each month). PLEASE IF YOU DON'T HAVE EXPERIENCE WITH AJAX AND WORDPRESS DO NOT PLACE BIDS. I'M SORRY BUT I DO NOT ACCEPT BIDS OUT OF [login to view URL]