Actually, you're all quite right - I became so focussed on getting the main resources for this site started and compiled that I completely missed the boat on defining what Foundationism represents. Essentially the criticisms that I am re-inventing Agnosticism are quite valid - at least, with the information I've presented so far.
I'm going to have to set up a "Foundationist Manifesto", or similar, in which I try and explain facets of the believe. Yes, uncertainty does play a part, as per the Agnosticism article - but Foundationism is supposed to be more complex than that.
I think I'll try and get that written up over the next month - envisage maybe 10 short articles, of which the "Foundationism vs Agnosticism" would be one - and then have a less aggressive relaunch for May.
Hopefully the search engines will have indexed us by then, as well.