Guest Gmail Chat in liferay Theme

Step1: If You are using gmail your chatback badge, visit http://www.google.com/talk/service/badge/New.
Or If you are using a Google Apps account, you can create a chatback badge by visiting http://www.google.com/talk/service/a/DOMAIN/badge/New where DOMAIN is the name of your domain.


Step2: Follow the Links of the page, copy HTML and paste into the webcontent source in liferay and also we could use structure and templates. Use web content display where you want the badge to be displayed. You'll know it's working if you see a large Google Talk bubble showing your current online status along with the message 'Chat with [your name]' (or whatever you selected as your badge title).

Configure/Integrate the reCaptcha in Liferay

You can now easily implement a different captcha than the default captcha in Liferay. Before, the default captcha looked like this and in order to change it, you had to set some additional properties in properties-ext.properties.

Now, you can quickly enable ReCaptcha via Control Panel-->Server Administration-->Captcha (to get a ReCaptcha key go here).

You need to login with your gmail id.

You will get this screen, copy and paste both the keys in

here as

Then sign out, and go to create account. You are now using ReCaptcha!

Thanks
Suhail Ahmed 
Source(http://vforliferay.blogspot.com/2010/11/configure-or-integrate-recaptcha-in.html)