I'm currently on version 2 of the ProPhoto Blog theme, but version 3 has been released! I'm holding out for a bit till I get a little more money in, but I'm pretty sure I'll be upgrading soon.
There's a huge list of new features available in this upgrade. The biggest new feature is the gallery slideshows. A huge feature is also the watermark overlay, you can add your custom watermark over any posted photograph with one click. They've also included new features with sidebars, widgets, social media icons and RSS feed image protection. There are tons of other great new additions and changes, too many to list here.
If you're new to ProPhoto, the Do It Yourself Package is $199 (this is the option I picked when I purchased) and the Handheld Installation is $279. If you're upgrading from version 2 of ProPhoto it's $89. Looking for a discount code for the theme? Use at DANNE232B checkout for an additional $10 off your purchase!
Full Disclosure: commission on ProPhoto Themes sold via coupon code.