Forum Moderators: open
link:www.mysite.org will give you pages that are PR4 and over, (generally speaking, there are exceptions), that link to your index.
The difference is this:
"mysite" will find text that might not be links.
link:etc will find links that might not use the text, such as <a href="http://www.mysite.org"><img src="icon.gif" alt="bob's your uncle"></a>
That said, searching the url in quotes is a handy way to find links you don't find with link: . I do that myself.