heh... suddenly found this thread for AIS I would recommend using versions from -devel, because pushing it to -testing and pure extras can take ages and existing there versions are quite outdated. btw, I'm planning to release a new version with kp51* packet-injection support by the end of this week or begining of next.
don't be afraid of 1 (one) d-bus call every 5 seconds. standard stuff polutes d-bus more. in case of getting paranoid & suspicious, just keep it off in settings