Msg#: 3797384 posted 9:20 pm on Dec 5, 2008 (gmt 0)
The EU has a some guidance towards member states to have their "telcos" retain their logs for 12 to 36 months. AFAIK member states are expected to convert that into local law. Now, as far as I know that applies to "service providers" as in ISPs, phone companies etc. not so much individual web sites.
Still, it is a good idea to keep your logs about for a bit, esp if you have user generated content that might eventually trigger law enforcement reaction as not being able to say "who did it" might end up you being the one that is eventually in trouble for some illegal content. Let's not forget that e.g complaints passed through interpol are very slow in reaching you (many months).