vajerzy,
Yes, the lathe boards were underneath the plaster, which I tore down because it was old and had too many layers of wallpaper on it to make it worthwhile. I kept the lathe boards and just put the backerboard (like drywall, but for tiling) right on top. We're going to tile the walls up to about 5 feet and then I have drywall above that, placed right on top of the lathe. It makes the whole thing really really strong.
The main issue with our house is fixing what the previous owners attempted. They were either really cheap or really stupid or both. They messed a lot of things up completely and did things really half-assed. For instance, I'm tearing down all the drop ceilings in the house... there are five of them... one in our bedroom, one in the bathroom (already gone!), one in the kitchen (already gone!), one in my music studio, and one in my office/soon-to-be nursery. After tearing two of them down I found out why they put them up in the first place: To cover their shitty plumbing jobs. Every drop ceiling in this house is hiding some cheap, half-assed plumbing work that needs to be re-done. Thankfully I can do it all myself.
We got some really nice restoration hardware for our clawfoot with a big shower head and porcelin (sp?) knobs. Beautiful stuff. I can't wait to get everything in that bathroom... it's going to be gorgeous!!!