Today I ordered a RFXCOM RFXtrx433 transceiver so that I can receive 433MHz signals. I hope that I can connect my 433MHz doorbell to my frontdoor camera, so then this week I have a page with doorbell pictures on my site.
Update: I received my module, now its time to catch up on my Visiual Basic, so i can write my own programs.
PS. thanks to Tane Domotica for the fast delivery, and thanks to RFXCOM for the fast email support.