Offer a pledge, cheapskates! 
I do not see this as a worthwhile exercise. Reason: Dans Guardian, while an excellent product, is not actually, really, licensed as GPL (see note).

There's some wriggling but it ends up that it is NOT free to use for commercial purposes. That's contrary to the spirit at least. Look at what all the developers here are releasing GPL-wise. And Red Hat. And Linus...
(Thanks guys!)
So DG is not a general solution to the problem. If this went ahead it would only be useful to non-commercial users (unless they buy a DG license). This may be why Dungog charges - no? We'll leave DG out of our portfolio.
<rant warning opinion coming> As a side note, *almost anything* to do with Smoothwall has been a bit similarly slimy right from day 1 (IMHO & E). We use IPCop - written by ex-Smoothwall developers of the same opinion. </unrant>
Charging for GPL is not the problem - it's the wriggling IMHO that is the problem...
MeJ
Note:
For all commercial[2] use, upon your downloading, DansGuardian 2 is licensed under the GPL, however permission to download DansGuardian from this, or any mirror[3], website is restricted.
The restrictions on the downloading for commercial use are that you may only download it once for free. This will enable you to try out the software before making a decision to purchase a commercial licence to download it. In order to download updates, bug fixes, etc, you must purchase a download licence.
