<a href="http://37signals.com/svn" rel="nofollow">http://37signals.com/svn</a><p><a href="http://37signals.com/bootstrapped" rel="nofollow">http://37signals.com/bootstrapped</a> <- not a blog but a lot of useful examples<p><a href="http://unicornfree.com" rel="nofollow">http://unicornfree.com</a><p><a href="http://kalzumeus.com" rel="nofollow">http://kalzumeus.com</a><p><a href="http://blog.asmartbear.com/" rel="nofollow">http://blog.asmartbear.com/</a><p>These are the best I've ever read.