Click here for an interesting piece on what's become of Jack Kerouac's estate. I don't know how accurate this article is, but I do know from personal experience that there is tension when Gerald Nicosia hangs around at Lowell Celebrates Kerouac events. Said tension was palpable (have you ever heard the saying, "As welcome as a skunk at a garden party"?), and when I asked about it, I got vague acknowledgments but no details. Perhaps this article sheds some light.
Which reminds me to remind you to have a will, make sure it's legal & current, keep the original somewhere safe & accessible, and provide copies to those it affects.
Note to self: Take your own advice.