I do appreciate the input, but if I have to hard-wire it, it completely defeats the purpose of having it in the first place. I would just run a USB cable & take the print server out of the loop.
I'm a little skeptical of attributing it to simple throughput overload. I may be wrong on these numbers(?) but I'm thinking 54mbps (b=bits?) is 6.75 MB/sec, or 405 MB/min. Like I said earlier, one photo I printed took well in excess of 20 minutes to print. Don't recall the exact file size that was sent to the printer, but they usually run 15-20MB. So a 20 minute print time for a file that size really suggests to me a malfunction of some sort.
Here's another clue that may or may not be significant... When it's in super-slow wireless mode, the pattern is that the print head can be heard to make a single pass over the paper and back, and then it will sit there for way too long, like 10-15 sec before starting the next pass. When it's working properly (through the USB cable), there is no delay at all between consecutive passes of the print head.
It may be that this combination (printer & print server) just isn't compatible, and truthfully, that was a calculated risk I took when I chose this model print server. Seemed like a good risk though, because the R1800 (the predecessor to my printer) is on the published compatibility list.