Mapping lists of tweeps, twitter users at conferences and panels

Need to map an ad hoc list of tweeps attending a map or conference?  This is your tool!   Just give the map a name, add some tweeps, then share new maps the URL.

Examples:
a) map of some tweeps attending the SUXORZ panel during SMWNYC in February 2010.
b) map of some tweeps attending the AnalyticsCamp at Chapel Hill, February 6, 2010.