While I don't normally get involved with deploying web applications (we normally have 'people' for that) however I did have to deploy the application you're using now. Which brings me to the blog post I recently found which discusses the top 10 best practices for ASP.NET which I've linked to on my toolbox page. The main one that concerned was of concern to me was forgetting to switch off debug mode.
2: <compilation debug="false" />
This setting appears to have a large impact on production web sites so I'd check out the detail in the this post to get all the details. Also you might want to check the config files of the production apps you work on or blog if you host your own; lets just say we may need to update a few of ours!