Windows, Linux, Mac?
8,0, 8.0.1, 8.0.2?
In Windows using 8.0.1 when I open (using Open(filename.xls)) an Excel file containing multiple sheets I do get a dialog asking me to choose. No more checkboxes though, I just select the names I want to import.
The problem I do seem to have though is that I only am getting a reference to the last one. So I see all the sheets but the script only knows about the last one.