I got my result from the National Geographic Geneographic project here is my results im not an expert on this subject so im not sure what to make of it all.
here is a screen shot i cant post it as an image as i havent made 10 posts
img715.imageshack.us/img715/2739/budo.png
I saw your results and you almost 100 % belong to haplogroup I2b1. It is haplogroup typical for Lower Saxony, and as you said that your surname is Sorbian by origin, it is understandable that you belong to haplogroup I2b1 becuse the Sorbs lives today in region of Saxony.
Look at map below,this is the position of I2b1 in Europe:
http://yorkyingers.com/dna_files/image002.jpg
And about haplogroup I2b1 from Eupedia:
I2b (formerly I1c) is associated with the pre Celto-Germanic people of North-Western Europe, such as the megaliths builders (5000-1200 BCE). The wide variety of STR markers within I2b could make it as much as 13,000 years old.
I2b is found in all Western Europe, but apparently survived better the Indo-European invasions (=> see R1b above) in northern Germany, and was reintroduced by the Germanic invasions during the late Roman period. Nowadays, I2b peaks in central and northern Germany (10-20%), the Benelux (10-15%) as well as in northern Sweden. It is also found in 3 to 10% of the inhabitants of Denmark, East England, and Northern France. It is rare in Norway, which concords with the fact that it hasn't been invaded by people from northern Germany.
There are two major subclades : I2b1 (M223+) and I2b2 (L38/S154+), further subdivided in at least 4 subclades each, although little is known about them yet. The subclade I2b1a (M284+) occurs almost exclusively in Britain, where it seemingly developed about 3,000 years ago.