Uhh, I think I found something.
From The Lost Media Wiki
I found the link that goes by https://id.bbc.co.uk/users/dash but it was 404ed because it doesn't exist anymore. However, I am currently on the Wayback Machine. and I found a sign in link that dates from October 2010. But however, it was the sign in link used by the BBC, not CBBC. Fingers crossed if I can look through archives of CBBC's website I may be able to find the website. Update from a minute later: I found this link! But unfortunately it was NOT archived from the Wayback Machine. http://www.bbc.co.uk/cbbc/nickname/index.shtml?ptrt=http://www.bbc.co.uk/cbbc/udng%3Fonwardto%3Dhttp%3A%2F%2Fwww.bbc.co.uk%2Fcbbc%2Fshows