According to a news article being carried by the BBC (http://news.bbc.co.uk/1/hi/technology/5041848.stm), a group of hacker have hit a web site operated by the Swedish police.
It seems that this was simply a denial of service attack, which swamped the machine with requests.
Unfortunately, denial of service (DoS) attacks seem to be becoming more prominent and I suspect we will soon need to be helping smaller clients ensure that their boundary devices are capable of withstanding such attacks.
I suspect it will also come as something of a shock to people when they learn how expensive some of these security devices are in comparison to "bog standard" equipment.