I love Moo Cards – they’re great.
But I’ve always wondered how they could be made more ‘useful’. This blog post on how Adegga.com managed to print unique invite codes on a bunch of cards shows how, with a tiny bit of imagination you can use bits of technology to hack together all kinds of things. And this is one even I can understand!
(Plus it uses the concatenate function in spreadsheets which is personally my favourite function)