Last week-end was great. I was at Insomni'Hack 2011 security event organized by SCRT. Conferences during the day (read Bruno Kerouanton or Emilien Girault), security challenges during the evening (6pm-1am). Short time and adapted challenges, staff did great! We missed the internet but we had beers :)
I played the challenges with some friends and we ended up in the first place winning a nice trophee, a Fortinet Firewall, some tshirts and other goodies. Thanks SCRT! If you are interested in the challenges, shell-storm has mirrored some of them (offline ones at least) while Djo, Emilien Girault and Pascal Junod have already published some write-ups. Also, staff said they will publish all challenges and solutions soon.
Last week-end were also Codegate 2011 qualifications, which I unfortunately did not play this year. Different kind of challenges, strong competition. Many write-ups have been shared by @codegate_yut.
Also, some cool stuff ahead: Honeynet public conference, HITB Amsterdam CTF prequals, HES 2011, and maybe a Plaid Parliament of Pwning (PPP) CTF.
And if you don't know what to do, there's a new wargame at Smash The Stack: amateria. Worth playing :)