Here are some recent conferences and workshops on sparsity and compressed sensing. From the link you can read abstract, download pdf files, and/or watch videos. Enjoy!
IMA High Dimensional Phenomena
Duke Workshop on Sensing and Analysis of High-Dimensional Data (SAHD)
SPARS 2011: Signal Processing with Adaptive Sparse Structured Representations
ICML 2011 workshop on Structured Sparsity: Learning and Inference