Every industry has it's chancers and the SEO/SEM(WPO/SERPO et al) industry seems to have it's fair share. Below is a list of the bloggers, SEO professionals, SEO Consultants and resources I pay attention to.

Searchbrat, Kieran Flanagan well worth reading through his blog.

www.searchbrat.com/

.Net developer and casual blogger on SEO topics.

http://alanfeekery.com/

More online marketing than SEO but interesting posts;

www.barryhand.ie/