From Wireless Europe:

ROMANIAN INVENTOR TRAPS CHEATING WIVES VIA TXTING

A Romanian inventor is using mobiles to help married men catch unfaithful
wives.

Vasile Prisca's device sends a text message when anyone heavier than the
wife gets into bed. The inventor says he knows it works because his own wife
was caught out by it.

"I caught my wife in bed with my neighbour using the device," Prisca said.
"I used it as evidence in the divorce court because I got the message on my
phone and went home and caught them at it."