I just tested some "old" applets with Firefox 3.0 and JDK 1.6 u10 (on Vista) - and I'm really impressed. I tested the Iris applet again - 3D photo viewing (3 D slideshow), editing, managing, application. It works smoothly, the initialization is relatively fast (about 20 seconds). Iris is a HTML, Ajax, Applet hybrid with remarkable capabilities (drag and drop from desktop, file upload). After start, just use a flickr name like "romainguy". I heard about some problems on Macs (NoClassDefFoundError) with this application - but who cares about it :-).