The real solution to this problem is to make it possible for ISPs to closely track RIR allocations in their filters in a semi-automated way. There may still be a few days of delay before a new allocation is fully routable but ISPs can compensate for that with internal processes.
Why can't ISPs subscribe to a feed of all new RIPE allocations in near real-time?
Personally I think this is a great idea and if we hear from a lot of operators actually willing to take such feeds it may become reality. However there are a number of serious issues with something like this, not the least of which are the liability issues in case this goes wrong very dynamically and semi-automatdly.
It is certainly something to progress if there is enough interest.
However I think the current proposal shold go ahead too because the false positives are a real problem now
Daniel
Could we not just have a file somewhere that shows all ranges allocated to RIR's. ISP's could then script to generate their filters. Jon