Well, you already know about Copyranter and American Copywriter.
Here are four 'new' ones.
1. onewomanrunning has started fake it until you make it. Today, she ponders the etiquette of eating lunch at your desk in an open plan office, wondering "are crisps allowed?" She worries about "being extra noisy". onewomanrunning is an aspirant creative, so we wish her the best of luck in breaking into our wonderful feet-up-on-the-desk world.
2. Lazbash, another aspirant, is a self-confessed art director, and newcomer to the UK. He provides this wonderfully odd clip, on his blog whatamidoing?
3. Joao and James, yet another start-up team, have created AdBook, which even (cleverly) links to their very promising portfolio.
4. Finally, do have a look at diablogue, whose co-writer is a regular and valued commenter here called Sean. Sean is digital creative director at Saatchi & Saatchi Sydney. His blog is stuffed full of gems. Here is just one - an advert for a design book.