How to 'linkify' plain text URLs (locally) on the Mac?

I'm copying a slab of plain text into TextEdit that contains URLs, which I am hoping to automatically (as there are a lot of them in the text), 'linkify' into rich text hyperlinks - make them clickable, and underlined in blue or as per the default appearance.

In WordPad on Windows, if you paste plain text, WordPad will automatically linkify any links, but TextEdit, Word 2011, and Pages on the Mac all will not.

I've also tried to export the text to PDF in TextEdit, Word 11 and Pages and fiddled around with Tools in Acrobat Pro itself - all to no avail.

An AppleScript would be fun, but (even if hooked into FastScripts), still not as quick or elegant as Windows' WordPad's instant and automatic linkification of URLs upon insertion into a document.

Is there something this elegant in OS X?