wi-fi enabled cardigans
rocket-powered weetabix
a fake pigeon to hide your keys inside so you won't be locked out
( vladimir, Thu 11 Jun 2009, 20:59, archived)

I reckon there's definitely a market for a "Spare Key" service
where you call them up and enter a pin code and they'll rush to your house and open your front door for less than the cost of a locksmith.
( Grrrmachine the indifference engine, Thu 11 Jun 2009, 21:03, archived)

I'll give you £2.50 for 63%

( Neptune A dole queue dosser and foul mouthed chav., Thu 11 Jun 2009, 21:05, archived)

DONE!
*takes out massive loans*
*pockets cash*
*points creditors to your house*
( Grrrmachine the indifference engine, Thu 11 Jun 2009, 21:06, archived)

My parents used a service a bit like this.
It was commonly termed "giving a spare key to the neighbour".
( Slippery Mick ‏, Thu 11 Jun 2009, 21:14, archived)