Your half right, I think I am the only one thus far who has cracked it completely and has natural Rubber Trees and everything working fine, I made a couple variations for our server which will be released here over the next couple days. Those think I am joking can think what ever they want but those who are interested in the actual progress and want to see exactly what I have been cooking check out the sample slide show below "IT IS ALL A WIP but I am pushing for release within the next few days., I don't wish to leak any information about how I did it but It is was easy enough. Yes I am running quite few plugins as well.
FYI: You should use OIL ID 163 for the stationary Oil instead this will prevent any such lag and lock up the oil will run when the player mines near it or updates the block around it.
http://img845.imageshack.us/slideshow/player.php?id=img845/7131/1338654073x69.smil