(Also: what can I do with the pile of wrecked cakes, culinarily speaking?)
Make homemade trifle! If you're cake was chocolate go for something like a can of black cherries and loads of whipping cream for a Black Forest cake style trifle.
If it was white (yellow) the sky is the limit, I love to use a mix of strawberries and raspberries and some homemade custard.
If it was a spice cake, it's great with slices of plums,apples or pears and toffee sauce between the layers.
You can use it between layers on a tall ice cream sundae, instead of bread in a summer pudding (it needs to be a strong cake like a pound cake to work for this, as summer pudding traditionally calls for bread), or just grab a fork and eat it as is...might not look like a magazine cover, but chances are it'll still taste great.