For good quality blog comments I liked inter... (sp?). He replaced one that wasn't there with a high pr comment with 0 obl.
Not found a social bookmarker yet (red virus doesn't seem to accept new clients), so have gone elsewhere for that. I go elsewhere for cheap scrapebox comments too. I've not got into xrumer yet, but will probably join DFB one day.
I liked a sakamura (sp?) mixed link package I got, so will try one of his other services soon too (mega link blaster?).
I was very impressed by an senukex package the other day, so when it is fixed and a reputable provider starts selling those I think that will be great value.
Good value mixed link building is best from linkpushing. (this is my recommendation to those that wanted cheap mixed links, you will have to add your own comments and/or profiles to the mix though)
side note: I've tried a few new providers recently, all have had issues in one way or another. There has been missing links, poor communication, broken promises, very late work, privacy issues, poor quality work and general lack of professionalism in some form or another from these guys. Going to stick to the tried and tested providers from now on, and just use fiverr for any shite that needs doing.