Recently we've wondered whether our next startup should have a much more personal feel - much the same way that say Peldi over at Balsamiq has developed his product and blog (http://www.balsamiq.com/blog/) and in a similar way to what Joel has as well. Peldi in particular has been completely transparent with his numbers and you do feel a genuine personal connection with him when you read his blog - I think this has helped him to connect with his audience (as with Joel) and you can relate to them both much more in a personal capacity.
For me I think it's important to have a blog (even just a coporate blog) - but I do wonder whether you can gain more traction by adding a personal touch to it.
Not sure what other YC'ers think ?