The drupal 7 port can't support passing in functions as the "title" setting

From the readme:

	TOOLTIP CONTENT
	--------------------------------
	In this field you can provide the HTML attribute of the desired content of Tipsy tooltip, or 
	any jQuery/JavaScript function that returns any value you wish.
	
	Examples:
	  1) Use the following to return the ID of the HTML element: id
	  
	  2) Use the following to return the anchor of an a tag: href
	
	  3) You can write the below function inside the Tooltip content textarea to make the content 
	     of the "title" attribute formatted uupercase.
	       
	       function() { return $(this).attr('original-title').toUpperCase(); }
	     
	  4) You can write the below function inside the Tooltip content textarea to return a custom 
	     content of your choice.
	      
	       function() { return 'My custom tooltip content'; }

This can't work in D7. The passed in function gets converted to a string. This was grey territory in D6 as well, so I'm not surprised.

My idea is to allow the user to pass in either an attribute name or a selector to an element underneath the main one,
so specifying ".contents" would match:

<div class="$my_trigger_class">
 <div class="contents">Tooltip HTML that can't really fit into an attribute</div>
 Ordinary text that the user sees
</div>

because our code would do "function() return $(options.title, this).html()"; (html or text depending on options.html)

There is a loss of functionality, but I don't see any other way.

Thoughts?