Honestly, I really LOVE this. I've made a few loads of them now for peoples phones, ipods and business card holders. I've even worked out how to make one for an ipod with cable attached (since we all keep ours plugged in at work) using postcards from our local Benugos. I really do think it's the most productive thing I've done in months. Seeing as I'm a bit just fed up with everything at the moment, this has certainly soothed my savage need to create and build something useful.
Finally I've found a second use for all my business cards! The first use obviously being for those "win a free lunch" draws at pubs and restaurants.