I'm glad to invite you to my short contest on codechef.com on Sunday, 18th. (Check your time zone here.) I also want to note that Anton_Lunyov help my a lot in preparing of the contest, thanks to him.
In order to take part in the contest you should be registrated on the site, you don't need a separate registration for the contest. The competition will consist of 5 problems for 2.5 hours, using the standard ACM-ICPC rules.
After the contest you can discuss problems here and public all your wishes for the next contests.
P. S. Please also note that CodeChef is now using much faster judging server!