Nice! Congrats! Working on the new configs and install now actually. Some notes to share.
1. Optifine and Forge aren't playing nice anymore. The game hangs on world creation and cannot be recovered. I've removed Optifine and it works alright. I'm currently using Forge 6.6.0.515 and attempted with the latest Optifine released yesterday. For now I'll leave that out.
2. The new buildcraft has been installed. I've tested it with every buildcraft addon right now on the list without issue. Additional Pipes, Logistics Pipes, Valve Pipes and Additional Buildcraft Objects all work just fine and have been physically tested.
3. The latest development version of Treecapitator is installed and working. It has built in configs that scan for just about every mod that adds trees or axes and incorporates them in. This makes configuring the mod as simple as installing it and running the game. No more messing with ID's
Because of the extra testing I plan to do for this next config pack, it will take some time. I'm not going to rush it at all so I can hopefully iron out all the kinks before it's released.
---------- Post added 2013-01-27 at 06:12 AM ----------
4. Just installed the latest Industrialcraft 2 and all the addons from the list. They all seem to be working fine.
5. Redpower installed without issue. Going to run a check for ID conflicts next and take a break
So far so good for compatibility with new versions.