Well, since you are Windows, IPC::Shareable and Mmap are out of the question. While the temp file solution will work, it will be hideously slow when dealing with large amounts of data.

One solution you can try is to use Storable to serialize data and send it through sockets where your programs can pick it up. However, that might be tricky. However, as your luck may have it, I am finishing up on a module (that I have been working on for quite some time) that does exactly that :) If you don't mind waiting a few days, you might want to take a look at it when it is done to see if it does what you need.