My former belief was that sitemaps were basically worthless. (I used to think that) Google only indexes sitemaps every once in a while, and they didn’t really help. This was proved wrong, though.
After reading this post on sitemaps, I completely changed my point of view.
It’s a really awesome post. If you have the choice between reading the rest of this post, or reading the post I linked to above, read the post that I linked too above.
I’ve always been a strong believer that sitemaps didn’t really help. That’s not exactly true though – they can sometimes get you index faster than with any other method.
Here’s the truth about SEO – there is no golden method for anything. You need to combine as many methods as possible to succeed. The most important method of all, however, is have quality content.
Again, you can find the post about sitemaps here. I suggest you check it out.