Brett and David (Elastic Threads) have just released nvALT 2.1, the latest version of their Notational Velocity fork. A number of updates have been included. A particularly useful addition is the auto-pairing of matched characters. David has also developed extensions for Chrome and Safari, enabling you to create notes from a snippet of text or a whole page.
If you’ve already been using nvALT 2.0 you can up date from within the app, if not get it here. You can read more about the updates here: nvALT 2.1 in the wild, and here: nvIt – Chrome and Safari extensions for nvALT.