For those of you who don't know, GRC is a graphical interface for generating flow graphs in gnu radio. There was much struggle when deciding the cut-off point for a new version. I finally drew the line and released version
0.60. I put a lot of work into GNU Radio Companion since I last announced to the list. GRC includes over 150 blocks from GNU Radio, supports all the data types (vectors too), and includes USRP support.