I like Flash as an application, but I typically don't care for most web sites that are created in it. With the combination of resized browser windows, and slow navigations or overall loading times, there is usually something frustrating about visiting a flash site.
However, none of that applies to Denmark-based Hello Monday. The "designery" specializes in identity, illustration, flash and campaign development, and the firm also has one of the nicest studio sites out there. Check it out.