Arena KM900 flagship phone along with a first peep at its dynamic 3D S-Class UI. While we're not seeing any of that promised multi-touch here, the cubic interface is interesting and makes good use of the KM900's 3-inch, 800 x 480 pixel WVGA display and dedicated media chip. It's also expected to hit in April for 4,500 Swedish Krona or $535 US if our translation of that image (lower-left) is correct. Worth it? Hit the read link for the video (in Swedish) and let us know.