Gotcha. A few notes on that:
* There are no 'widgets' to do that. The Send button, the Like button, comment box, etc. Those are widgets provided by Facebook, of which there are none to post something to a users wall.
* You can do that programmatically. With a few lines of code, you can post to any of the user's friends walls. To do so:
1) You'd need to know the friends Facebook User ID. That can be obtained in a few different ways either by asking the user, or going through all their friends (again, using some code to get their friends names)
2) You'd need the 'publish_stream' permission. JFBConnect asks for this automatically if you have the post to wall on login or register set, but you can also add it to the 'Additional Permission Requests' box in the configuration area to make sure it's requested.
If you wanted to build a whole form to show to the current user with their friends in a drop down, you could do something like the below:
bobbelderbos.com/2011/08/example-faceboo...ost-to-friends-wall/
JFBConnect will help with a lot of this.. you'd only need to start from the "Post To Wall" section, and there are things that JFBConnect would make simpler in the code samples they provide. Just pointing this out to show you what could be done, but that it's also not something that's as easy as a {JFBCsomething} tag.
Hope that explains a little. If you have more information on what exactly you want to do, that may help... automated post to a friend's wall when they view a page, a way for a user to 'recommend' an article to a specific friend, etc
Thanks,
Alex