I think your other replies have good information--the other products you are
looking at are detecting cookies that Microsoft Antispyware presently
ignores.
However--I do like your idea.
For an antivirus, there is the EICAR test string which enables a user to see
whether the protection is in place and what an alert looks like.
For the moment (I hope they'll fix this eventually!)--here's something you
can do as a test:
Right click an empty area of the desktop.
Choose New, text document.
Right-click the name of the new document, choose rename.
Rename it to test.bat. Say yes to the warning message about changing the
extension on the name.
Double click on the icon you have created.
You should get a clear alert--in this case about Trojan--Poebot.
Be assured that you haven't just created a trojan--this is a misleading
identification of an innocent empty .bat file. However, it will enable you
(until they fix this!) to see what an alert would look like.
I think the idea of providing some facility like the EICAR test string to
see that real-time protection is functioning is a great idea.