The two-way data mode WSJT-X has sparked quite a bit of interest, and several stations have been active and some have made two-way contacts. The software is still experimental and not 100% reliable yet. Most activity is on the faster modes WSJT9-1 and WSJT9-2, but there have been some experiments up to WSJT9-30 (30 second transmission length).
I have logged DF2JP, G1SLE, DF6NM, DK7FC and G8HUH.