The VMware Networking team mentioned this as a VMware development in the works--

<strong><em>Wireshark Plug-ins</em> </strong> . <a href="http://www.wireshark.org/" target="_blank">Wireshark</a> is a great tool for frame-by-frame dissection of your network traffic. You can just install Wireshark in a Windows or Linux guest VM on a promiscuous vswitch port and away you go (select appropriate VLAN via the Port Group or all with VLAN=4095). The plug-ins add additional protocol dissectors so you can get analyses of VMotion, HA heartbeats, FT logging and so on (<a href="http://communities.vmware.com/servlet/JiveServlet/downloadBody/10690-102-1-9170/TA3521_formatted_v3.pdf" target="_blank">look at Howie’s presentation for some screenshots</a> ).