Finally got round to seeing Attack the Block. Would have to agree with Sheep, that - for the most part - the slang is the cause of a lot of the humour. I was expecting Nick Frost's character to have more of a role though.
Similar to Shaun of the Dead in that it was a a genuinely entertaining film enhanced by being funny, gorey and containing some level of 'realism'. Comparing the two films, though, leaves Attack the Block some way behind. It was funny, but there weren't any laugh out loud moments for me, while there were plenty in Shaun of the Dead. The realism was also only really present in the characters and the settings. Although both plots are unrealistic in equal measures (however much people might obsess about zombie apocalypses), the way that Attack the Block played out made it seem a lot less realistic than Shaun of the Dead.
Not sure what to make of the ending.