I’ve been a huge fan of Posterous since it first launched back in 2008. I wrote a post here detailing my dry run using Posterous as my full-time blog.

Since I wrote that post there have been a few major developments over at the Posterous camp. Perhaps the most profound change has been the opening up of the CSS for Posterous to allow you to change your theme or completely customize it yourself from the ground up.

I’m still not sold that Posterous is powerful enough that I would feel completely confident in moving there full-time again, but they are definitely making some exciting headway. Two of the most recent announcements I’ve been really excited about are the Flickr integration:

Just paste the URL, e.g. from the address bar:

into a post or an email, and you’ll automatically get the Flickr embedded slideshow, shown below.

and the Retweet functionality built into default themes.

First you’ll need to go into your customize panel and activate the retweet button.

Once you’ve done that you should see the retweets showing up on all of your posts. Not only your future posts but past posts as well. The implementation is top-notch as well. You don’t even have to leave the blogs comment page to retweet a post.

The co-founders of Posterous have been giving the impression that there are a lot of cool new features coming down the pipes over the next few months. If one of those improvements is a more powerful web dashboard for publishing posts, I may be chomping at the bits to get over to Posterous full-time once and for all. Right now I’m still extremely excited to watch the changes unfold on my mobile blog jamespoling.mobi.

• Posterous launches killer new iPhone App, adds Themes and CSS/HTML Customization
• Tumblr vs. Posterous
• Flickr and Picnik Keep Getting Better and Better
• The Social Media Briefcase
• Zen and the Art of Blogging: Hosted vs. Self-Hosted – Where to Begin