The reason why 2004 was a banner year for property damage is because we have such good technology, not necessarily because storms are getting worse. Along with better protection systems and more advanced warnings comes a feeling that it is more safe to live somewhere. So more people build houses in the area, and when disaster strikes, they run away, then come back to build more houses.

I don't know if storms have increased in power over the past x years, but looking at things like deathtoll and destruction costs are not good measures.

Not only the routing table, but I believe OpenBGPd has hooks into pf. Henning mentioned being able to filter and/or queue in the future based on labels assigned to packets in OpenBGPd. You might be able to strip that away for a portable version, but it certainly won't drop nicely into IPTables.