I don't know if this is a dead link, or the server is just temporarily down, but it is a great pizza sauce. I make it from memory now, but will try to summarize what I do.
http://www.thehomepizzeria.com/recipes/san-marzano-tomato-pizza-sauce-recipe/#
1 large (28 oz) can of San Marzano tomatoes. Don't skimp here, they make a difference
1 medium clove of garlic
~1TBS dried oregano
1 capful of red wine vinegar (I estimate this is slightly less than a teaspoon). Lemon juice can also be used.
A pinch of salt, and a few turns on the pepper mill
Pour the tomatoes into a fine mesh strainer over a bowl and break them open so the liquid can escape. Leave them in the strainer, stirring occasionally, for 30-60 minutes. You want most of the liquid out. Set the liquid aside, in case you want to add a little back later.
Transfer the tomatoes to a bowl, and mash them up
Mash or finely dice the garlic - almost a paste is good her - and add to the tomatoes
Add the oregano, pepper and red wine vinegar, stir to incorporate everything. If you can let it sit for an hour or so, even better.
That's itr