Dear Colleagues, The original deadline for abstract submission for the International Category Theory Conference (CT2011) was May 1. This has now been extended until June 1. I would ask, however, those who have not already submitted an abstract and intend to do so, to send me a message by May 1 notifying me of their intention to submit. The conference website is http://www.mat.uc.pt/~ct2011/ . Steve Lack (Chair of Scientific Committee) [For admin and other information see: http://www.mta.ca/~cat-dist/ ]