To get a quickstart you should have a look here: README-VDPAU
Reinhard Nissl provides patches against xine-lib-1.2 development tree, which might be handy for some VDR users. You can find them here: http://www.jusst.de/vdpau/files/xine-lib-1.2
More stuff can be found at http://www.jusst.de/vdpau/files.
Due to some chinese bots which killed our servers by loading all mkv samples in 30 sec intervalls we had to lock the samples directory (http://www.jusst.de/vdpau/files/samples with a login. If you want to try some of the samples or have a broken sample join our IRC channel, we will give you information on how to down-/upload it.