There is a european mobile phone show coming up next week and as a show classic you expect to see some concept phone leaks from companies; I saw a couple today but the noteworthy one is this one from Sony Ericsson called Alona. I can't tell how thin it is but it sure is a slider with a touch control interface on the front. Safe to assume it has a MS Duo port on the side. japanese design influence; it loosk quite yummy indeed. Will update this with pricing and availablity details after the show.
UPDATE: W980; HSDPA, 2.2" TFT (240 x 320), 8GB mem, 3.2MP camera, BT, FM Radio, Turns out to be a clamshell design afterall. In stores June 2008