It has been a while since I saw two space craft flying this close together (last time was I think a Sojuz making a rendezvous with Mir back in the late 80s).
Tonight space shuttle Discovery (mission STS-119) will dock with the International Space Station at 22:13 CET. Below you can see a picture I took 30 minutes ago (20:11 CET) from my backyard. The trail from both space craft (and one air plane) is visible.
Here a 100% crop, the yellow arrow points to ISS, the white one to Discovery. The separation between the to space craft was about 11 kilometres.
Since it's always hard to aim your camera for these events, I didn't catch the whole trial. Though this way it's still visible how close they where flying together.
Picture data: Canon EOS 20D, EFS10-22@10mm, F4.5, exposure time 93", ISO 200, whitebalanche is a bit funky
Pretty cool!