Being a two-device man myself (small smartphone + handheld computer) I’m not a great fan of ultra-convergants. I had the E90 for a while and although it was an amazing piece of tech that could, given patience and a reduction in quality, achieve anything, it was too much of an all-round compromise. Too big to use as a phone and too small to run a desktop OS. Even if the device was powerful enough to run a desktop OS, the screen size would be way too small. If you needed to have only one device with you though, these ultra-convergant devices are the ones to go for.
This is the latest from Sharp (branded as Softbank) and goes one better than the E90 and Advantage by offering a WVGA resolution on a 3.5″ screen.