I am also looking at microSDXC cards. 64GB Class 10 are the only ones I am looking for.
There are only three MicroSDXC 64GB cards I have seen so far.
SanDisk 64GB Class 10
SanDisk 64GB Class 6
Team Group 64GB Class 10 ~ R/ 40MB/s W/ 10MB/s Max (IOPS R/500 W/150)
I plan on waiting until Samsung releases their own 64GB microSD card with 20
~ Read and Write Speeds.
Anyone who is looking for 16GB and 8GB cards these cards have nice speed ratings at B&H Photo Video Webstore.
Samsung 16GB microSDHC Memory Card Plus Series Class 10 ~ R/ 24MB/s W/ 21MB/s ~ $19.95
Samsung 8GB microSDHC Memory Card Plus Series Class 10 ~ R/ 24MB/s W/ 21MB/s ~ $11.95
Samsung 32GB microSDHC Memory Card High Speed Series Class 10 ~ R/ 24MB/s W/ 13MB/s ~ $29.95
It won't work because that is a SDXC. You need a microSD, but the item you linked to is a normal SD card.