Lisa and I are playing Midgaard and the old DikuMUD at the same time, looking for differences. Please join us. You'll need a MUD client with tabs, like MUDlet (which we're both using for this). We've got the old and new in two tabs with identical characters and we do the same actions in both.
It's really fun, and we've logged many little changes in messages or logic which needed to be changed.