its currently only available via cvs: http://linknx.cvs.sourceforge.net/viewvc/linknx/linknx/linknx/

great work erpel!
played a bit around with my dockstar and your repo and everything works fine!

but since some days there is a new version of linknx (0.0.1.29) and also knxweb2 available!
would really be awesome if you could update your repo with the new linknx!

YAY! i got it finally working! 
problem was pthsem installed to /usr/local/bin instead of /usr/bin
so i compiled pthsem from git with ./configure --prefix=/usr
then compiled bcusdk from git and it worked!

debian:/usr/local/bin# findknxusb
Possible addresses for KNX USB devices:
device: 1:4:1:0:0 (ALBRECHT JUNG GMBH & CO. KG:KNX-USB Data Interface)

how do you fixed this?
i'm having exactly the same problem...

the usb interface is there:
generic-usb 0003:135E:0023.0001: hiddev96: USB HID v1.01 Device [ALBRECHT JUNG GMBH & CO. KG KNX-USB Data Interface] on usb-orion-ehci.0-1.4/input0

but findknxusb doesnt find anything:
debian:~# findknxusb
Possible addresses for KNX USB devices:
debian:~#