Get an app called Dropbox, which will allow you to upload the photos to the web. Then download to a PC and burn cd/memory stick as usual. You can also do it via iTunes software on PC but I've never really figured it out. Someone will be along to tell you how soon....
I have moved photo's from the iPad to PC by just plugging the iPad to the PC USB socket and it appears like an external hard drive, to then have to search around to find the photo's and copy them across to the PC. You can't seem to do it the other way around. The crazy thing is to get your nice photo's to Tesco to print them you appear to have to have a PC, says a lot for iPads!