Well, just a little. I mean, what's he going to do next? Add a few books onto the Bible?
In contrast, Douglas Adams is not writing the next HHGG book (entitled And Another Thing...) because he is, inconveniently, dead. Instead, the job is going to Eoin Colfer, author of the Artemis Fowl books. I haven't read them, but no matter how good they may be, they cannot transform Colfer into Adams, and the Hitchhiker series was all about Adams' voice -- that absurdist logic, wild imagination, wicked eye for sci-fi conventions worthy of parody, and cosmic indifference toward mankind, an utterly unimportant species on a backwater planet his books referred to merely as "mostly harmless." Colfer is already celebrated for his own unique voice; how easy will it be for him to suppress that and channel someone else's?