I know this is an old thread, I hope the mods will not be too miffed if I add to it. I really like the idea of impressing/stamping logos, and spent a bunch of time looking at it about a year ago. The best DIY I saw was one by Ballyhoo soaps, unfortunately that link is now dead. It is referenced by this one, though, which includes pics, maybe enough to put things together. One of the cool things about the Ballyhoo one was that s/he used soap for the "impression plate" (not sure what it is really called), she printed out the logo, put it on top of a piece of soap, carved out the image, made a little open topped box to encase it w/duct tape, then poured the two part resin on top. Here's the link referencing it, it is from Joanna Schmidt's blog (the owner of MadOils.)
http://thesoapbar.blogspot.com/2012/02/im-soap-stamp-crazy.html
Also, for those of you who are interested in rubber stamps for fabric/paper/clay stamping, this site seems kind of awesome, it is a non-profit that employs people who are mentally/physically challenged and it is great b/c you get to cram as many designs as you can onto a sheet and then cut them out and mount as wish, great value, I would think. Plus a good cause. I have not used them yet, but will some day.
http://readystamps.com/instructions/
ETA: I don't know who Joanna ended up going w/with her stamp, but I love her little quirky logo, and it looks great stamped on the muslin goodie bags she sends out w/her orders. She really does have the best packaging out there, I am never excited to open a box *b/c* of the way it is packaged except for hers, she just makes it fun.