Hmmm, geez I've never even given driftwood a second thought. I've got some pieces in my FW setup I found years ago, collected from creek beds and so on. A strategic rock here or there to keep it submerged until it's waterlogged, and away I went. My plecs actually nibble on the stuff so it tends to get a little smaller over time anyhow, eventually I'll need new pieces. I forget where I read this, but some (or all?
) plecostomus actually need that kind of roughage in their diet.
But uh.. yeah I'm with Canadian Man on this one though. If you're going to go through all that much trouble, then why bother in the first place? Isn't there stuff you could purchase instead and save yourself the hassle? Are discus so sensitive that anything less than 100% sterilized/pasteurized/etc. is going to be a problem?