Knowing exactly what your user wants will allow you to serve them better.  Web based applications will allow your users to submit information to your site and provide a wide range of interaction.  You can use forms to capture information, a content management system to control content yourself, a searchable calendar that takes reservations, and almost anything else you need.  We use a variety of languages, tools and skills to develop these applications, including PHP (oop), MySQL, Javascript, AJAX, XHTML, CSS, Linux, Apache, Perl, Flash ActionScript, SOAP, RSS, AppleScript, Content Generation, Image Processing (GD), Video Processing (ffmpeg), Debugging, Form Mailers, Calendars, Captcha, Form Validation, Permalinks, and more.