Yup, working fine here, but...
1) you have to have had it installed on an Android smartphone first
2) have Titanium Backup available for making a backup of that install
3) send the backup to the TF700T
4) CRUCIAL: uninstall Whatsapp on your smartphone
5) restore the backup on the TF700T
Step 4 is absolutely crucial because Whatsapp disallows account-sharing-like activity -- i.e., you may not use one account on more than one device. They have banned users in the past for doing so.
As an alternative, you might buy an el cheapo prepaid sim from Tele2 or whatever. Just backup the previous Whatsapp installation to a safe location, wipe Whatsapp data, then uninstall Whatsapp. Power off, put that prepaid sim into your smartphone, reinstall Whatsapp and reconfigure and activate using the new phone number. Then backup again, transplant to TF700T, restore backup... et voilá. This route would enable you to restore the first installation afterwards, thus having two Whatsapp accounts. May come in handy, might be a nuisance -- that depends...
You can pm me if you need more assistance.
"Professionals are predictable, but the world is full of amateurs."
-- Murphy's Military Laws, as referenced on http://www.military-info.com/freebies/murphy.htm
"The skill of accurate perception is called cynicism by those who don't possess it."
-- Alan Millar