First set up a Skype account for the remote site.
The make a batch file like this:
Enter into notepad, using the appropriate path to Skype.exe in the first line, and the Skype name or number you want called (normally your Skype name)
cd c:\program files\skype\phone
START Skype.exe /callto:(Skype name or number)
Save the file as Skype.bat
In the Yawcam motion detection 'Actions' window, select run .exe , and browse to where you saved the Skype.bat file
It pays to have flood control activated and set at at least 60 seconds.
When a motion is detection the remote computer will Skype you! Answer the call and you'll hear what's happing there. Talk and you'll be heard at the remote site.
If the call to you is unanswered the remote Skype will hang up after a few rings.
Cool huh?
If you also set Skype on the remote computer to 'autoanswer' (and block calls from other than you and those you want in the contacts list) you can then also initiate a Skype call to your remote computer and listen and speak at that location from wherever in the world you are.