Brahmotsavam at Sri Ranganatha Perumal Kovil tiruneermalai started on the 3rd may 2012 and ends on the 14th may 2012. Details of the utsavam and stala puranam can be read from:
http://anudinam.org/2012/05/04/brahmotsavam-starts-at-tiruneermalai/
Some of the photos taken during the utsavam can be seen below:
Photos: Thanks to Raju Battar Thiruneermalai
Click on the first image to see it as a slide show