From a comment on another, somewhat less reputable, site,
Maintaining your web presence beyond your demise, if that is important to you, should be provided for in your estate plan.
But leaving an unfunded request for blog immortality will only go so far. Would a life insurance policy be in order? Sean? Any other ideas from a tactical perspective? What would be an appropriate size bequest to keep a blog online forever? (In my case, I would also like to leave an endowment to support at least 1,000 daily readers of my old posts. They could be in India or wherever as long as they read English.)