Sotirios Terzis is the chair of the 6th International Workshop on Middleware for Pervasive and Ad-Hoc Computing (MPAC 2008), a Workshop of the ACM/IFIP/USENIX 9th International Middleware Conference (Middleware 2008) taking place December 1-5, 2008 in Leuven, Belgium.
You can find the call for papers here.
The deadline for paper submission is August 1st.