Hi,
I want to add Facebook, Twitter and Google+ Like button in my blog portlet.
i have downloaded facebook Hook its working and i tried for twiitter going throug twitter's official like button code but its not working good
i found that in facebook hook some tag is used like

<div class="facebook-like">
<script src="http://connect.facebook.net/en_US/all.js#xfbml=1"></script>
<fb:like href="<%= viewEntryURL %>" show_faces="true" width="450"></fb:like>
</div>

here <fb:like> </fb:like> is used so my questins are
1. Is this tag is available in liferay portal TagLib
2. If not then how it works.
3. Is there similar tags for twiiter and google+
so i can easily add like buttons like facebook.

can any one explain how to add like buttons
thanks