Yahoo! conducts Hack Day for Hackers around the globe and now it is going to be in India for the second time. The last open hack day was conducted in 2007. Open hack day is for non-Yahoos! It is been conducted on 14th and 15th Feb at Taj Residency Hotel, Bangalore. During the Hack day you need to develop applications using Y! Services in 24hrs. Interested hackers can register here. There are also various technical talk to be held at the venue.