Actually, I wouldn't really know. First thing is that it's kind of hard to damage your CPU (sure, if you solder a Vmod on your mainboard or you decide to hammer the heatsink on the CPU). If the hardware is installed properly, I think it's even hardly possible to damage anything at all, no matter what settings.
As modern mainboards are fitted for overclocking (for instance, the MSI CoreCell technique) I think it's become accepted and a pretty regular thing to do. AMD even unlocks the multiplier of the FX CPUs (ideal for ocing, useless for other situations)... so I think you'll be alright.
As the chances on a damaged CPU are very slim and your using settings your mainboard provides you with, I think you'll be ok. Esp if you buy a cheaper CPU (the 3000+ comes for a really low price), the risc is close to zero. At least, that's what I think
(yes I do OC... I haven't run any system, except for my laptop, since 1996 without overclocking...)