I have the generic Ebay one. In the past 3-4 weeks it has not gone down again. I am very careful now to keep a backup of what is on the card, on my PC hardrive as well...so all it takes is a quick format and recopy the files over in order to get back up and running.

I was about to ditch it and go to a 2 GB card....but have since decied to live with the uncertainty and keep using the 4gb with the PC backup.

I keep Hubdog and Weather panel loaded as main memory and all other programs on the card...the only daily issue I see is that the icons (if placed in the startup/first seen/menus selction place) seem to not appear upon a soft reset...though they still work fine. If you browse to them in file explorer, they seem to come back. The first time I did this I about had a heart attack as this is the same behavior that lets you know your card has been dorked again by data corruption....The missing Icons only seem to happen to the programs that are on the memory card AND are selected to appear right away in the "menu".

I keep hoping someone will come out with an official 4 gb MiniSD (non-SDHC) at some point that works better....but until that happens I will live with my occasionally buggy generic one...with regular backups. When a new Sprint PocketPC comes out with SDHC support, I will likely switch to it.