[What's going on with the popular character Croyd Crenson, and is it difficult using him since Roger Zelazny's passing.]
Croyd has a big role in the new Wild Cards comic, THE HARD CALL, just out from DBPro. The first issue just went on sale, so be sure to snatch up a copy.
Yes, you'll be seeing him in the books as well, but I won't say when or where. That would be telling.
We all miss Roger, both as a writer and a friend. He always enjoyed it when the rest of us made use of Croyd in our stories, so we mean on doing so, as our own little memorial to his genius.