The WineConf 2005 was held in Stuttgart April 30th and May 1st, 2005. The ReactOS project sent Steven Edwards and KJK::Hyperion. The ReactOS talk was the first talk of May 1st. Steven did the talking and KJK::Hyperion acted as an advisor for the more technical questions. See the slideshow that accompanied the talk (Microsoft Powerpoint format).
The reaction was mostly positive, but doubts have been raised about the role of ReactOS in the ecosystem, and many Wine developers have dismissed it as a "cool toy". Finally, Tridgell of Samba fame has offered help in porting Samba to ReactOS
For more informations you can also look at the offical wiki. http://teknoskand.dyndns.org/reactos/images/wineconf05_grp_tn.png
Want to see the big picture? Look here!