Ok, maybe not so original. But never mind. Having looked through the salsa threads, read the salsa links, googled a million salsa formulae, and stared for days at my festering tomatoes and gazillion hot peppers, here's what I decided to do.
I cut the tomatoes (these were at least 5 different varieties - none Romas, which I know would be preferable, but I used those yesterday for sauce) into very thick slabs. Also cut a couple of red onions into thick slabs. Preheated the BBQ and grilled the tomato and onion slabs on a grill-topper thingy. Both sides, until slightly charred and soft. Drained the excess liquid out of the tomatoes and coarsely chopped them in the processor. Coarsely chopped grilled onions too. Added a bunch of chopped cilantro, a few minced cloves garlic, a few finely chopped fresh hot peppers (not jalapenos, mostly - something else, very hot) and some lime juice and salt.
TA DA! IT'S DELICIOUS! And I know it will freeze well because the main ingredients have been cooked - also the excess liquid has been drained. (Will use liquid in soup - I promise.)
I had been dreading the ripening tomato crop and now I can't wait for the rest of them.