Yesterday, I bought one of Microsoft's ergonomic wireless keyboards. Nice, quiet keys, slightly curved, felt like reasonable quality to me. This morning, writing, I noticed how it skipped letters if I wrote too fast. I tried moving the receiver (from right next to the keyboard) to further away, to below...) without any real improvement. So rather than replacing the unit with another, I just returned it. I just can't be arsed.
I am considering a Maltron keyboard that Cal was kind enough to link to, last night. Don't know if I dare or not--it is really different from any keyboard I've ever seen.