More and more people are starting up BI blogs these days.
Richard Lees - finally Richard is blogging, sharing his very considerable experience with the world. Coupled with www.richardlees.com which houses, live PPS dashboards, SSRS reports, Excel Services pivot tables, data mining examples and more for all to see and interact with.
Boyan Penev - I really enjoyed I working with Boyan for some months on a customer engagement and am very glad he has started blogging too. I can see that he has published an article on SQL Server Central recently as well.