Thanks!

Pitcairn link is not working, though! Some permission issue, 403 Forbidden..
Oops, thanks. Will fix right now.
Thanks, nice work. Here's my rates:
R9 280x, 1130/1575: 5.050MH/s
R9 270, 1123/1250: 3.100MH/s
R9 290, 1000/1500: 5.640MH/s
7990, 1030/1500: 4.630MH/s (per gpu)