What are the best (free) intermediate-to-advanced DIY resources on the
net? (other than this newsgroup

Most sites that I have seen either:
- Shamelessly plug product (...10,000 uses for Brand X glue...)
- Are aimed at the novice (...how to change a lightbulb..)
- Tend to be way too superficial (...how to remodel your kitchen
in 100 words or fewer...)

So, what are your favorites out there?