I hope that people can build extensions of block explorers to watch where these funds get sent and when they get sent to a known entity we can slowly backtrack and narrow down who the scoundrel was who did this.  Bitcoin isn't anonymous as people think---Its got Lojack built in.  Using some good old fashioned Link Analysis, thefts on a grand scale can be monitored.   I'd like to see something built into the Bitcoin user interface that would check a database of reported stolen bitcoins and send an alert when some were received from an address in the database.  We can all be Big Brother collectively.