There are two types of Dbox2 (and make sure its a 2) one for Cable and One for Sat the good thing about the dbox is that its Linux based software so you can change a lot more on the software in fact you can use the same Enigma software as the Dreambox with a slight difference.
The are hundreds of European sites that support the Dbox but get Firefox with a translation plugin as there are very few in English there mostly German.
You can pre-load all Cams into the software so no need to buy an extermal cam for any viewing card and all of these are readilly available for download. Most of the images are the same for Cable or Sat and auto detect the type of box you have installed it on, hence you can't get sat on a cable box and vice versa.
If you are thinking of buying one you need to make sure that its in Dbug Mode, that means you have hot wired the Flash Memory to except additional software and you can then use an number of Dbox tools to write a new image to the box.
There are currently 3 versions Sagem,Nokia and Phillips about but the Phillips are rare and supposed to be better in sat than Cable versions. The sagem is built like a tank but people report that they can give problems when using diseqc 1.2 to control a motor its a bit hit and miss. The nokia arent too bad
But yoiu need to check the chip configuration on them as they have a number of versions that except different image formats
1x chip
2xAMD
2Xintel
if you flash a 1x to a 2x box it will need some additional sofware to recover
All In All they are good at what they do provide easy linux based software with all the functionallity of the Dreambox in fact the Dreambox seems to be built on the Dbox format.
Blue4Ever