Jim,
Your piece is coming along nicely. Sorry I meissed yesterday, but a wedding was on the schedule. Oh well.
Next time, when you get even more in to the neander way of working, you might consider wedged through tenons on the verticals, or sliding dovetails on the front and rear of the vertical partitions so that the weight of the shelves is carried on two boards, for less deflection. This is more important on drawers, where slight sagging will cause the drawers to be misfit after the passage of some time.
If you go with the sliding dovetails, then to make the assembly possible, since the DT portions will only be about 2" long each, just cut the partition overwide, rip the partition, join from front and back, and make the edge glue joint in place. It does make disassembly a destructive process, however.
Alan