Fresh and hot from the presses: UKCrashReporter 0.1. It's a simple function that checks for a newly-changed crash log file at application startup, and if it finds one extracts the topmost crash dump and offers the user to send it to a CGI-script on a server. where you can do with it whatever you think is appropriate.
Compared to Smart Crash Reports and other such tools, this doesn't require any signal handlers, daemons or software patches. As always, available in the Source Code section.