Speaking of Notational Velocity, did you know…
by Brett Terpstra
I just found this old, but excellent, trick.
If there is a URL on the clipboard, and you use Notational Velocity’s ‘Paste as New Note’ command (⇧⌘V), “it will actually download all of the text of the page the link leads to, title it and insert the original url at the beginning”.
In the comments, Zachary Schneirov (Scrod, creator of Notational Velocity) adds:
You can also just drag the URL icon directly into the notes list.