hi, I don't know of any live cd/dvd that comes with code::blocks. The closest thing that comes to mind right now is KNOPPIX. IIRC, the live DVD has qtcreator, eclipse and certainly has a gcc/g++ compiler.
You can also create your own distro with code::blocks
I believe some distros like ububtu even provide tools for creating customizable live cds easily.
Also, using a quick google search I have found
this site that lists a lot of live cd distros, so you might look if any of them fits your requirements