It is very easy for me, as a small publisher and a regular visitor here at ENworld, to remember this most important fact of this business:
You guys aren't my customers.
I mean, ultimately you are, but more importantly, my customers are the distributors and retailers. You can vow to support me all you want (and believe me, it is appreciated) but if the distributor won't carry my products, you're never even going to have the option of supporting me, or any of the many fine smaller d20 publishers.
So remember: Talking to your friends is great, but hounding your local game store is even better.
Someone else just above mentioned that the d20 logo isn't that important-- that their purchases are made based on reviews and word of mouth here at ENworld. As much as I wish it were otherwise, this is a very small niche of extremely informed gamers, and a tiny portion of the "market" that a publisher must consider.
Wulf