Wow, well, first, I think the explanation *has* been given, both by Jeremy and Kilandra.
EA Japan is releasing their own SKU with these items as part of a promotion, and once they've finished their initial run they'll be available here as well. Releasing codes online at the same time would completely conflict with their promotion, but we have made sure we'll have them too.
These items aren't replacements for Veteran Rewards, or anything else commemorating the 11th Anniversary of UO. We still have quite a bit of the 11th Anniversary year to celebrate