Import seperate XML posts

I have this custom blog system, which uses seperate XML files to store each post. Might seem weird? Well that’s why I’m planning to move to WordPress! ??
My question: does anybody here have experience with importing a whole bunch (I’m talking 100’s) of files into WordPress? Perhaps a tool that reads the data and converts it to SQL? I’m just thinking out loud and I my guess is that I will probably have to write my own import-tool, but hey… I figured I could always give it a try on here! ??

Thanks for any advice and/or solutions!