Following Kathy Sierra's highly unfortunate, but hopefully temporary, exit from the blogging world, I'm left wondering how to fill the void.

Some other great ones, aside from Kathy's:

Seth Godin's Blog
ProBlogger, for blog specific tips

What are you favourite blog resources for business?

Seth Godin is my hero

I'm also a massive fan of Seth and his musings.

I'm a big fan of Creating Passionate Users and Signal vs. Noise.