You could try installing this:
Its a find my phone/tablet solution that is intended to be installed after you lose the tablet. Since the Touchpad is wifi only, I wouldnt count on it unless you had the wifi set to never sleep, whoever took it never turned it off or rebooted to webOS, and it happened to be near wifi. But you never know, might get lucky.
Current phone - Motofail Backflip (CM7.2 Stable)
Current Tablet - Nexus 10 32GB (CM10.1 Nightly)
Next Phone - Nexus 4 16GB.
Previous devices - Motofail Atrix 4G (CM10), HP Touchpad (CM9), Asus Transformer TF700 + dock (rooted stock ICS), Nook Color (CM7.1), Samsung Blackjack II (WinMo 6.1)