Mybloglog has been pretty good, here is an example: http://www.mybloglog.com/buzz/community/natrond/ Submiting your RSS feed to directories and having the RSS feed pinged on updates will help also. Best of all, these are all free.
Yes I just signed up with mybloglog and I have noticed an increase of traffic already. Its is really nice.
I’ve been doing this for some time now and the only way to promote your blog and generate good traffic is by working hard and creating good content. Think less in traffic and more in content because in the long run it will pay off.
Technorati and Feedburner have been useful for me in the past, however Google is where you need to get your traffic from - unique, regular content with good keywords in the titles will pay dividends.