I've been doing alot of general SEO research lately, and it seems like lots of websites ranking for competitive niches are using very "select" blog networking and not a whole lot of it. Also, I see alot of custom web 2.0 usage, where the web 2.0s are branded for the companies. I see a lot less of massive blog network posts etc. Seems like using niche related domains is where it is at. Some sites I see have tons of blog network back links with domains like wedding guide something pointing to their SEO company. That doesn't make a lot of sense for links when someone manually reviews them. Anyone else noticing these trends?