Ask HN: mod_proxy for Apache?

I'm looking in to a software proxy/cache/load balanace solution for my shop, which is primarily Apache-based and med-low traffic (avg peak is maybe 75 hits/min). nginx, lighttpd, haproxy, Varnish, Squid, etc. all look interesting/appealing/cool, but now that mod_proxy is baked as of Apache 2.2 it seemed like it may be a better choice given our existing support commitment and relatively low volume.

However, it's easy to find people raving about their nginx/lighttpd/Varnish/haproxy/etc. solution, not so much with the Apache one, and I'm trying to feel out some experiences with how successful and robust Apache's new-ish solution is.

So is anybody using Apache 2.2 mod_cache for proxy/cache/LB? How do you like it? If not, but you considered it, what turned you off?

Thanks! And sorry for the new account - long time lurker, first time poster.