Scott over at Post-Click Marketing Blog frequently conjures very interesting metaphors for search marketing, and I love a good metaphor! In this post, Scott draws comparisons from post-notes and billboard and how they are a reflection of your PPC campaign elements.
Ashley over at Online Marketing blog has written a solid article on 5 Tips for Driving Qualified Traffic with Online Marketing. The article covers some tried-and-true methods such as know your audience, give them what they want, and choose the right keywords.
Katrina over at PushONline Marketing has a great post on the differences between Google analytics and Urchin. If you use either, you may find her post incredibly useful and interesting!
Jeremy from PPC Discussions has written a post on the accuracy of the new Google Adwords keyword tool feature that is showing numbers of actual searches performed per keyword level. A test he performed showed Google was surprisingly within 5% of what his June keyword impressions were. Nice Google!
Display networks (including Google's and others out there) offer some great opportunities for expansion in your accounts. Utilize what's already available and stay at the cutting edge to make the most of your opportunities.