Dear Colleagues, Registration is now open for MFPS 23. The meeting will be held on the campus of Tulane University in New Orleans, LA from April 11 through April 14, 2007. The program features five plenary lectures and four special sessions on topics ranging from security to systems biology to physics, information and computation. A list of the accepted papers and of the invited speakers is linked to the MFPS 23 home page http://www.math.tulane.edu/~mfps/mfps23.htm There is also a link on the home page that leads to a registration form for the meeting. In addition to the usual MFPS program, we will also hold a Tutorial Day on April 10. The topic this year is domain theory, and there will be lectures by Andrej Bauer, Achim Jung, Giuseppe Rosolini and Alex Simpson. There is no charge to attend the Tutorial Day, and graduate students are especially encouraged to attend. Best regards, Mike Mislove