A free-roamer mod has been released by Particle Systems, and posted at I-War2.Com. Here's a snip out of their newsbite:

    Hi there! We've had quite a quiet spell here. We're treating it as a calm before the storm. Anyway, to keep the interest flowing, Steve Robertson of Particle Systems has released his Free Roam mod. For those who have finished the last mission and would like to continue roaming space and generally be a nuisance to shipping. As always there's a descriptive explaining the mod but please make sure you read the information in the Extras Screen.
Please peruse their site for the number of nice mods and other tidbits they have, but for those who want to get right to the heart of the matter, the free roam mod can be found here