Neal,
I guess you didnt find any info on that site I gave ya. Anyhow, just from my limited experience with my Minolta DiMage 7, I really cannot tell a difference between an Ultra card or a regular ole card. Write speed really depends (for me anyhow) on how large the picture is. Anything over 1600X1200 takes awhile to load into mem. Say if I load a 2400+ sized picture it takes close to 20 sec or RAW is even more slower, doesnt matter which card try it on