Hostgator is one of most professional hostings companies, it was bit expensive but it offers a lot of very important features. My blogs are on Hostgator from a lot of time (2008), and every time i had probles I simply contact the support via chat.
iPage to celebrate summer offers a great 58% off on their shared hostings plans. If you are a beginner blogger you can think to start your online business blog from iPage. Until Sunday 7/24/2011 you can buy an unlimited hosting plan for only 2.95$/month.