Well, I visited my external hard drive this weekend, and to my surprise, I found the lost Graphical Search Engine (GSE) query files. All of the files are listed on the GSE page. So, it looks as if the BW Blog is 100% operational!
As mentioned on the GSE page:
The point of offering these many examples of Graphical Search Engine queries is not that you were probably looking for a search just like these, but rather that you see many examples of different things the GSE can do and maybe are able to teach yourself from these examples how to get some powerful results out of this workhorse Search Engine in BW.