I will discuss new ideas and application domains of our Open Source IEEE 802.11a/g/p OFDM transceiver for GNU Radio. The transceiver is implemented completely in software without the need for changing the firmware of the FPGA. For that reason, the structure and mode of operation of the transceiver is easy to understand and it is straightforward to extend. In our opinion, an SDR based WiFi transceiver has several interesting applications, one of them being its use for research in Vehicular Ad Hoc Networks (VANETs). In this field, the applications for an SDR implementation range from investigation of security and privacy issues, through simulative performance evaluation of receive algorithms, to experiments in field tests. In the talk, we discuss the possibilities and limitations of the SDR platform, as well as our current state of the art. We will highlight what is already possible, present results of our performance studies, and also show where improvements, hopefully with the help of people from the Open Source community, would be desirable.