Click on the little satellite dish, then InfoCenter settings:

Go to RSS Feeds and click Add, then copy and paste the following string:
http://search.twitter.com/search.atom?q=RevitHelp

Done!

While you are at it, why not add What Revit Wants:
http://feeds.feedburner.com/WhatRevitWants

Notes:
Twitter RSS that doesn’t work in Communications Centre:
https://api.twitter.com/1/statuses/user_timeline.rss?screen_name=RevitHelp

Read more:
Is there any way to display my tweets via an rss url? | Twitter Developers:

If you try to open Revit 2012 and it stalls at the splash screen, you can try ending the process WSCommCntr3.exe by accessing it in the Task Manager and clicking ‘End Process’.

The video below shows the issue:

I think that the problem is definitely related to the WSCommCntr.  This is the Autodesk Infocenter, and it should be located at:
C:Program FilesCommon FilesAutodesk SharedWSCommCntr3lib

As I state in the title, stopping the offending process is only a temporary solution.  There may be some issue that you need to correct.  For instance, my Task Manager also showed WSCommCntr2.exe and I essentially also had to stop this process to get the Autodesk Infocenter to behave.

Feel free to comment if you would like your experience with the Autodesk Infocenter.

I have previously had other issues with Revit stalling at the splash screen:
SECSplashWnd error – Revit 2010 stalls on loading