The search bar is too high to me in my opinion and it's still pretty empty on the lower part. Even before the fold which looks semi bad. Try to fill in some color or something, but I have this problem also, so good luck.
You need to make the seach field bigger i think, otherwise a nice site. What script are you using or is it a custom one? Does it use spiders?
What exactly is a spider? You hear it all the time. Is it a custom script that acts as a searcher? Designed to ping random websites?
From WIKIPEDIA: A Web crawler is a computer program that browses the World Wide Web in a methodical, automated manner. Other terms for Web crawlers are ants, automatic indexers, bots, and worms[1] or Web spider, Web robot, or—especially in the FOAF community—Web scutter[2]. This process is called Web crawling or spidering. Many sites, in particular search engines, use spidering as a means of providing up-to-date data. Web crawlers are mainly used to create a copy of all the visited pages for later processing by a search engine that will index the downloaded pages to provide fast searches. Crawlers can also be used for automating maintenance tasks on a Web site, such as checking links or validating HTML code. Also, crawlers can be used to gather specific types of information from Web pages, such as harvesting e-mail addresses (usually for spam). A Web crawler is one type of bot, or software agent. In general, it starts with a list of URLs to visit, called the seeds. As the crawler visits these URLs, it identifies all the hyperlinks in the page and adds them to the list of URLs to visit, called the crawl frontier. URLs from the frontier are recursively visited according to a set of policies.