TechCrunch's audience isn't all-encompassing.

If they didn't respond and you have a stellar product, just contact their chief competitors. I'm sure they'd love to profile you.

GigaOM, TheNextWeb, Mashable, ReadWriteWeb, etc. Tech news isn't all about TechCrunch.

That said, I think the best feedback loop is just a simple "Show HN: Here's my project." I'd say that not only are we super friendly, but we'll actually give you back feedback, suggestions, complaints, and advise like no other.