I use fboweb's $14.95/month tracking. It is great! Airport summaries, area tracking, visual tracking, flight alert systems, and basic tracking. It can track any civil craft that has filed an IFR flight plan. I highly reccomend it! I also use flytecomm's airport summaries. The maps also have dopplar overlay, and most self-update. It is a great tracker for business jets, cargo, passenger, and civilian traffic.
------Forever Watchin' The Sky------