Those acrylic tubes supporting the peninsula section were specially ordered (at a cost, after delivery and tax, of $229). It's probably my biggest splurge for the room in terms of appearance for the buck. There were lesser and easier options for sure, but I had to keep the beautiful Macintosh G5 tower visible from all sides! The tower, by the way, is bottom supported with a Simpson HL76, cushioned with foam rubber on sepetir, then hooked on top with an acrylic L panel.
All this is mere furniture, I realize. It's not "home improvement" in the purist sense, but I have to mention it because the entire room's design is based on it. At this point, the office is 95% complete. I think everything came together very well.
I was also glad to have found Kensington's extended wrist pad. It's a nice 27.5 inches of smooth, straight, nylon-covered gel, so a keyboard and trackball can be placed side-by-side on it. There's no feeling of hindrance sliding left to right. It's totally seamless. In fact, I designed the keyboard pull-out just for this particular Kensington product.
Total cost
All the sepetir subtotaled $534. All the maple (solid and plywood) was $565. Connectors and metals another $385. The acoustic tackboard assembly was $202. As shown above, the completed workstation and wall shelving with miscellaneous hardware, supplies, finishes, xenon lighting, under-cabinet fluorescent and the wall panels totaled $2,130. It compares favorably to the $6k+ quotes I got from California Closets and places like Galvins, which would be just laminate material and very "stock" functionality.