Jonathan,
In reference to your questions;
1. There are two functionally effective ways to use TeaTimer, one requires 'technical intelligence' meaning knowledge of the registry and spyware and how/where they might attack.
The other is to simply recognize whether anything you have recently done (accepting a download for example) could reasonably be expected to generate a TeaTimer alert, which only requires a 'common sense' level of understanding. If you don't believe you requested something, you should generally block the change.
2. Testing firewalls is relatively easy similar to antivirus, since either the traffic can pass or not, though 'leak tests' take this a bit further. Testing spyware can be a long tedious process if it's done right, per my description above, though some feel that's not necessary. I personally don't trust the results of any test unless the methods and complete results are described, so I can understand how they were determined.
I wouldn't want to rate the Spybot shield against that of Defender or others without complete information as to what they monitor, which I've never personally seen. There are descriptions, but it's been a while since I've seen a complete comparison chart of all the major application's real-time protection.
Immunization is another layer of protection relating to Internet Explorer; Restricted Sites, ActiveX blocking, Tracking Cookie blocking.
This is what I mean when I say that Spybot is most useful in the hands of someone with a more technical background, since without that knowledge its alerts can be mis-understood or simply missed altogether. This doesn't make it bad, just more suitable to a technical user.
Education is great, but unfortunately nearly useless for the masses. I salute those here and all throughout the web who attempt the insurmountable task of educating everyone, but I also understand that it won't happen, at least in our lifetimes. This has been true throughout the history of all technologies, including current items like the cell phone and iPod, and even older things like the car. Some will never take an interest in understanding a technology beyond their daily use, which is actually totally appropriate. Only the technically inclined (us geeks) have a problem understanding this, which is why new technology is so often difficult to use.
For the masses, the job of protection, along with updating and backup, need to be performed by the system itself. After all, wasn't this the promise of the computer in the first place? Instead of us spending our time managing, maintaining and protecting our computers, they were supposed to save us time and effort. This got lost over the last 20 years, since most of the software development was done by and for geeks. This is now finally changing, to the benefit of everyone, at least those who don't make money off of the ensuing mess.
Do note that the current development of Spybot S&D 1.5 is also taking this into account. See this link to a comment by Spybot's developer today that shows this direction.
TeaTimer 1.5 issues
Also note the comments on
this page from your PC World reference, especially the second paragraph where TeaTimer is mentioned. They also don't mention these forums as a technical support option. probably because most articles in PC World are keyed to commercial applications, which pay for advertising after all.
You'll note that I believe in applications to aid the masses, not because the people who help in manual malware removal aren't helpful, but because it doesn't scale. It's also much better to stop the malware from installing in the first place, so alerting the user to this fact if it can't be stopped automatically is key, and at that same moment there is an opportunity to educate the user if they will accept it.
Spybot S&D was one of the first to monitor and alert in real-time for spyware with TeaTimer, it's gotten left a bit behind over the last couple years, but the coming 1.5 update looks promising. There are many clues in the first couple threads in the Beta forum, so read there for more specifics.
I still believe in Spybot S&D, though I also believe that it's best to examine the abilities of the user and match that to the anti-malware application(s) they use.
Bitman