Is there a security app that works on the wifi-only Gtab? Something that can lock, wipe, locate in case of loss or theft? Most of these apps are for phones.
There will not be much available in that category. Reason being that the wifi only does not have network access. If it's lost or stolen with no wifi available or disabled there is no way for the application to function. The sorry.
Seek Droid will locate and lock your tab. The new "Find my tab" feature of Touchwiz is supposed to do everything you want but I haven't had the greatest results. I would get Seek Droid. I think its only 99 cents.