This is a request for all those who will attend or may attend CT2011 to send me email stating "may attend" or "will attend" on the subject line. This information is needed so I can have a preliminary estimate of attendance for the various events and excursions as well as making sure the lecture room sizes are adequate. Since a preliminary participant list will be drawn up soon it would be helpful to have your name, university or city and country when you respond. Those who have already registered do not need to reply. Due to several requests the early registration deadline has been extended to May 23. John MacDonald Information from an earlier announcement follows. INTERNATIONAL CATEGORY THEORY MEETING CT2011 in Vancouver The website of CT2011 http://www.mat.uc.pt/~ct2011 is now open for registration. Information about submission of abstracts and the booking of accommodation is also available on site. Early booking of accommodation is recommended as the University will not hold the block of rooms reserved for our meetings past June 16. The conference will take place on the campus of the University of British Columbia in Vancouver, Canada from Sunday, 17 July, through Saturday, 23 July 2011. It will begin with a reception at the Student Union Building (party room on the second floor) of the University of British Columbia campus at 6pm on Sunday July 17 and will end at 1pm on Saturday July 23. There will be a Lynn Canyon visit and a Harbour Cruise on Wednesday and a Conference Banquet on Friday night. Please pass on this information to any interested colleagues who are not on this list. INVITED SPEAKERS Marcelo Aguiar, Texas A&M Univ., USA Richard Garner, Macquarie Univ., Sydney, Australia Andre Joyal, UQAM, Montreal, Canada F. William Lawvere, SUNY at Buffalo, USA Sandra Mantovani, Univ. Milano, Italy Robert Pare, Dalhousie Univ., Halifax, Canada PROGRAMME COMMITTEE Michael Barr, McGill Univ., Montreal, Canada George Janelidze, Univ. Cape Town, South Africa Stephen Lack(chair), Macquarie Univ., Sydney, Australia Tom Leinster, Univ. Glasgow, UK Susan Niefield, Union College, New York, USA Diana Rodelo, Univ. Algarve, Faro, Portugal Giuseppe Rosolini, Univ. Genova, Italy Myles Tierney, Rutgers Univ., USA ORGANIZING COMMITTEE John L MacDonald (chair), UBC, Vancouver, Canada Maret Christiansen, Vancouver, Canada Jorge Picado, Univ. Coimbra, Coimbra, Portugal Richard Wood, Dalhousie Univ., Halifax, Canada Previous meetings were held in Genova, Italy (2010), Cape Town, South Africa(2009), Calais, France (2008), Carvoeiro, Portugal (2007), White Point, Canada (2006), Vancouver, Canada (2004), Como, Italy (2000), Coimbra, Portugal (1999), Vancouver, Canada (1997), Halifax, Canada (1995), Tours, France (1994), Isle of Thorns, United Kingdom (1992), Montreal, Canada (1991), Como, Italy (1990), Bangor, United Kingdom (1989) and Louvain-la-Neuve, Belgium (1987). [For admin and other information see: http://www.mta.ca/~cat-dist/ ]