There's a really nice campaign running for an eco-friendly electricity package from utility company EDF in France at the moment.
The ads feature little corners of blue sky like so:
These are located in all sorts of places: in a postcard rack, in someone's back pocket, in a child's pram and so on.
Assuming my rough grasp of French has allowed for the true subtleties of the headline, this reads something like: because everyone is entitled to their own little piece of blue sky.
A quick scan of blogs (and again assuming my translation skills serve me right) suggests that the campaign launched with a DM drop to all households consisting simply of this little corner of blue sky with the line on the back reading this piece of blue sky is for (your name). No branding but just a telephone number - which gets you through to the EDF sales line.
A pretty neat way, it seems to me, of making something which many might see as dull, a little bit more charming.