Hi, do not wish to be creepy. I'm reading through friends of friends as LJ catastrophes always have a morbid fascination for me. Anyway, hello, and I can tell you that if you import your LJ comments to DW, DW will merge the two. Nothing gets overwritten. Though I wouldn't be surprised if you have some trouble with it right now as their servers are probably being slammed (again, you won't loose anything, but don't be surprised if it stops on you in the middle. Just run the import again if that happens.)