Ok, I've seen this posted more than once on the forums and I thought that this false information should be nipped in the bud. Tinkers Construct smelteries can still be generated in villages. They weren't removed from village generation. This may seem not to be the case but I assure you, they were only made to generate more rarely. I just found a generated smelter inside a village using the latest stable version (1.4) so yes, this is the latest version and they still spawn. Any information to the contrary is false.
There, now maybe people will stop saying villages can no longer spawn them.
Addendum: If you use the seed 3215739466374980400 and go to the coordinates +165x, +135z you'll see a village with a chance to spawn a smelter on both default and BoP world types. However, the smelter spawning is NOT guaranteed - to reroll the generation completely close out minecraft to the FTB launcher and relaunch the game to try for a smelter.
There, now maybe people will stop saying villages can no longer spawn them.
Addendum: If you use the seed 3215739466374980400 and go to the coordinates +165x, +135z you'll see a village with a chance to spawn a smelter on both default and BoP world types. However, the smelter spawning is NOT guaranteed - to reroll the generation completely close out minecraft to the FTB launcher and relaunch the game to try for a smelter.