Great news!
Learned from ashkulz recently that the null bytes error when using the eb1150 usb driver with impserve in linux is a thing of the past. I just verified this for myself using Ubuntu 8.04.
Accessing the internet from the links in your content/index.html now fully work; as it does for the links within a .imp ebook.
Only thing missing is direct .imp creation support;

but you can now download any .imp onto your device from the internet!