Filed under: CellphonesSo we heard from a very reliable source that mobile user interface guru Matias Duarte -- who you may know as the man behind the Sidekick and Helio UI / user experiences -- actually left Helio late last year to join up with Palm. Although no announcement was made, we hear he and his gang of designers jumped ship (well before Helio completely flooded) to take on the monumental task of designing the UI for P
