eWeek has an article talking about Beta 3 of Longhorn and it mentions the current IIS7 Beta hosts:

  • MaximumASP
  • DiscountASP
  • Applied Innovations
  • Hostmysite
  • Web Fusion

and mentions the following hosts are due to release their offering soon:

  • CrystalTech
  • Mosso
  • Affinity

You can read the article here:

http://www.eweek.com/article2/0,1895,2122318,00.asp