I do a little woodworking of my own and I really liked the work that Mike Dudek at clickypost.com does so I decided to try making a block of my own and this is what I came up with.
I started with two pieces of walnut, one longer than the other that I glued together, then planed down. I made a couple of mistakes with keeping the holes in line but, c'est la vie.
I overestimated the size of holes that I would need for my bigger pens so I wouldn't include the larger holes again. I realized that I had included too many of the largest holes so I cut the last row of them in half to make a kind of an architectural detail. I loved Mike's idea of a slot for my journal but I also wanted a narrower slot for correspondence or cards, that was why I made the whole piece longer.
Mine doesn't have the kind of architectural bauhaus simplicity that Mike has designed into his but I am pretty happy with how it turned out. If you are interested you really should check his out at http://clickypost.com/the-store-1/ (No affiliation, just inspiration)