I joined hp.com way before I came here. If you guys haven't checked it out recently, the webmaster added some new cool options ("my thread", chose threaded or flat, ability to edit now, how many threads on a page, list by latest reply or newest thread.) I DO however like the design of that site better. And there's a few people on there who's very knowledgable.
The reason why hp.com may suck is because there's too many newbies asking the same questions on there. Like, "what intake should I get", "I'm new at this, what should I do first". Dammit, if you don't know what to get don't get anything! Do some research first.
IMO, I see that ha.net is more about parts, what's best/new etc. and hp.com is more for maintenance and troubleshooting (2nd, 3rd, 4th gen). Because I own a 4g, I check both sites everyday.