iMatix have submitted support for AMQP 0.9 packet sniffing to Wireshark. This will be integrated in the next production release of Wireshark (0.99.6). In the mean time, if you would like to try it out, you can download a recent nightly build of Wireshark here.
AMQP packet sniffer now available
Summary:iMatix have submitted support for AMQP packet sniffing to Wireshark.