RFC1918 in public networks

Hi,

We are a medium sized ISP, and as such we have a publicly visible network 
using non-private IP space. I am looking to renumber our entire network to 
private IP space, and was wondering if any other members have done this. 
The only problem I can see is that traceroutes from outside our AS will 
fail at our border routers, which will make troubleshooting harder. Has 
anyone done this and would they recommend it?


Robin