AJ,

Sony has a new dual-layer burner that tops 8GB, but media is still pretty scarce. Others are coming out with them also. In fact almost all non-burned DVDs are dual layer, with capacities well over 8 GB - it's only the DVD+R and DVD-R which are limited to 4.7. Even then, from a practical standpoint, you really have only between 4.2 and 4.3 GB of the 4.7 available for data, which served as a surprise to me the first time I tried to burn 4.5 GB to a DVD+R.

I'm sure it's compressed, just like the Knoppix CD is, but if Knoppix ever wanted to "publish" this in a dual layer DVD, they could easily double the content again!!

jd