With my Treo650 I have tested different brands 32, 64, 128, 512, 1G and 2G.
The behavior and performance up to 1Gb is OK in all terms, pics, movies, documents, music, whatever..
With 2GB it works, —so I have to accept Palm's article where they states so—, but.... the truth must be complete or is not the truth as well as I know from my Law study.
In terms of pictures, which is my principal interest, performance begin to decrease dramatically after +/- 1000 pics . That means, you have 500 pics (standard size, as per Palm suggest, or larger) and they are shown almost immediately.. When you have 1500 they are shown after 2 to 5 minutes delay and so successively.. Once you have 2000 pics, to see them you can seat down, have a large drink, sleep a while, watch a movie, and after 15 minutes the Palm clock is still running.. and no pics are still shown..!! Of course, having pics separated in folders of no more than 50 pics per folder. If you open the "ALL" option, is better to die!!
Can someone seriously states that it works?
On the other hand, once you open a folder to see the pics, movie-clips, etc, you can not do anything else, you can not stop the device searching or reading, or... or.. whatever be, You can do nothing...! Nothing can be done...! I must also say that the Treo switch's power off after +/- 3 minutes, you turn it on again and.. nothing, the clock is still running.
I use the Treo650 to keep a lot of
quick reference information in terms of documents and it does fine, but important to me are also pictures and movie clips where the 2GB hangs.

Despite I still have 1.2 GB free..!!
Must people understand, as I did, that Palm"s statement refers to a full performance or behavior of the entire memory card. It is not a matter of brand, all are the same. Then it must be a Palm malfunction, or??
I always understood that Palm devices are quick machines to have information at once!
As an additional comment the Life Drive performance with the 2GB memory card is excellent!!
May be this post help you..

I have been Palm user (or heavy user) for many years and with almost all device models..