I’m generally very pesimistic about those search engine optimzation (SEO) ‘consultants’. Frankly, I rate them somewhere between snake oil and used car salesmen. My basic premise is that if your content doesn’t suck, people will link to you and then you will naturally rise in the search results. Basic natural selection.
However, there are some basic hints that will improve the general ‘search engine friendliness’ of your blog. The article below is a good collection of these hints and it includes code examples for Moveable Type and WordPress to implement the hints. Good stuff.