Mashable sucks a lot, their posts are just derivative of whatever PR piece is sent to their email. They implemented a social network to get them more pageviews but it's now turned into a porn den.
VentureBeat started out by just reporting VC money and so on but switched. I liked him when he was with Mercury News but I haven't really been visiting his site as the other ones pretty much covers it.
Allen Stern wants to be like Michael Arrington and he's done a good job thus far. He breaks news every now and then and provides great analysis.
Silicon Alley Insider is shaping up to be a great tech news source. Topical, on point, and constantly updated.
And as much shit as Valleywag gets around these parts, they're still a top read in my book if you're an outsider in the Valley and want to pretend you fit in.