Below is a quick piece of code I have knocked up which may solve this for you (I haven't got a development environment available at this moment so this is coded from memory):

public static PageData PageFromURL(string url)
{
    var urlResolver = ServiceLocator.Current.GetInstance<UrlResolver>();
    IContent contentData = urlResolver.Route(new UrlBuilder(url));

    PageReference current_ref = new PageReference(contentData.ContentLink.ID);

    PageData current = DataFactory.Instance.GetPage(current_ref);

    return current;
}

@Darren: your code is correct but can be improved 

var pageData = urlResolver.Route(new UrlBuilder(url)) as PageData;