It is very good tutorial, but it is not a very advanced creation. Most creations these days make use of 1.8 slime blocks+piston combination, or have command blocks. However, great tutorial for the fireplace. I hope you make more tutorials in the future.
Adventure maps maybe? One I'm done with mine, I'd be willing for you to use it on your server. It is in the snapshots, but I think it is very close to the actual 1.8 release. Also, command blocks don't need Bukkit.
Already looked at it, too hard to narrow down the choices…… I mean sure you probably narrow it down using those options, but still after that there is 1,000s of skin to chose from and about 1/3 of them suck.