Found via a Facebook ad (those things do work after all!), PickUpPal puts drivers in touch with people who want to share a trip. So if I'm driving from London to Yorkshire this afternoon*, I can have a look on the site and see if anyone wants a lift - and get paid for it. Or if I want to get to Oxford on Saturday I can see whether anyone is going from near my house and/or for less than the price of a couple of train tickets. Like the brilliant Park at my House, PickUpPals uses the web to provide a peer-to-peer solution for a real-world problem that has historically only been solveable by businesses. This is exactly what the web is for - saving people money and hassle by coordinating effort properly. Love it.
(Turns out Mashable reviewed it earlier in the year as "eHarmony for hitchers". So I'm late to this party. So it goes.)
*Alas, I am not