We took on the rustic x table project and used the oxidization process described in the links (black tea then vinegar/steel wool mix). It turned out great! A few things I learned... When using the black tea if the tea runs it makes a difference. I had my wood up against a wall and was painting vertically. It pooled at the bottom, seeping into the wood. Didn't think this was a big deal but when I went to oxidize it you could see where it seeped. I couldn't sand it out without really lightening the wood too much. So, its there as part of my imperfect project. It kind of adds to the rustic look :) I let the vinegar/wool steep for a long time so it was more brown than gray. I ended up liking it (read: i didn't want to redo the whole thing) so I went with it. I really do like it though. I had to sand a lot to get it to lighten up some. We wanted a coffee table too- but something round. So, my husband invented the coffee table you see in the picture. He used the same kind of wood as the rustic x table and we used the same process to finish it. The time estimate mentioned below is just the end table.
Vinegar/steel wool to oxidize (steeped about 2 weeks)
Lots of sanding
satin poly coat