Hello SimoAmi,
Looking great as always :-D It'd be nice if you could provide some graphical sparkle to AOS.
Just a little constuctive critisism :-) :-
The screen titlebar is way too cluttered, it should be simpler maybe just a clock and a screen gadget. OS X keeps it's menubar very simple with only a couple of items for example
I'm sorry, but I don't like the icons too much, although they are much nicer than the ones posted before. It'd be cool if you could hook up with Matt or Mason and throw some ideas about. I love glowicons, but there is always foom for that little extra sheen. :-D
I don't think that HTML shell would be a good idea. This may sound old fashioned but, fixed-width clear font is the way to go.
The gadgets are just amazing :-) However, the tabs don't look like they are connected to the object they are tabbing. Also the window scrollbars look out of place compared to everything else. Replacing them with the scrollbars used on the other gadgets would solve this. I'd also have a continuous progress bar as well as the range on non-continuous progress bars you have designed (if only for the sake of compatibilty)
Also don't forget that OS 4.0 is a limited release and some of the concepts here would require a lot of re-working (and would also probably break older software- for example stuff that expects window borders)
Otherwise it's amazing. Although everytime I look it does remind me of winXP slighty and I'm not sure why.