Just to post some others informations:
1) i bought my Rocoo Class A from a deutsch dealer and it come with a firmware version newer then the one posted on the HiSoundAudio Site (Version 01.00.0001, Date 2010-04-14);
2) i also bought a Cube C30, but i had several problems with it! I had to reset several times the player and each time the sorting function of SigmaTel chip keep scanning the 16 GB card, so the players is quite impossible to operate. It come with a firmware version 41 with speaking function that read commands and song name: i tried to see if it would be possible to upgrade it to the last version that i found (Version 43 without speaking function), but i only found firmware on a chineese site with chineese instructions.
I think that the player badged Soricom could be a copy of Cube C30 and i hope that would be possible to install the Soricom firmware, if it exist, to solve Cube problems....
P.S.: sorry for mistakes, but english is not my first language!