Elastic Threads has also put together some amazing browser extensions (Safari and Chrome) to go with the nvALT 2.1 release. Clip links, selected text and entire pages (optionally using Instapaper Mobilizer) straight to nvALT.
You can download both extensions at Elastic’s website. If you use the Instapaper Mobilizer option, you can turn off Readability in the import preferences. It’s faster than the built-in Readability anyway.