diplo definitely connects with his audience. may not be for everyone and for sure you could make a case for musical colonialism... but he has done a lot to break various scenes around the world. i think it's fair to call him an innovator.
the term bloghouse doesn't get a lot of love from me. you can use it as a catchall for the stuff thats fashionable in that arena - french touch, that kinda indie disco sound, post electro house electro house, the US party hip-hopesque tunes, random party stuff... but there's quite a broad range of music there.
basically i think it's yoof reclaiming the dancefloor after lingering trad 90sisms or 80s revivalism and having a good time with it. in one sense there's less focus on authenticity and more on creativity and cool reuse or misuse of pop culture... making stuff cool for the sake of it, having fun, being optimistic. it seems quite healthy and outward looking in a sense.
blogs and twitter are the best thing about the web at the moment imo... there's an incredible volume of creativity on display, being networked, shared. feels like a cultural explosion and very much reminds me of the genesis of an indie/undie genre of music where all the names and labels etc are flourishing and being discovered etc.
at the same time the web has really matured as a medium over the past couple of years. the next decade is going to be phenomenal...