Now that SanDisk 32GB MicroSDHC cards are selling for sub $100 prices Kingston has upped the ante. The current batch of cards are abysmally slow at Class 2 speeds. That translates into a minimum sustained transfer rate of 2mbps when writing to the card.
Kingston announced a new line of Class 4 MicroSDHC cards at 32GB capacity. That bumps up the minimum transfer rate to 4mbps. The only problem is they plan on charging a MSRP of $153+. The cards start shipping this week so we should see what street prices are soon.
As a side note there are some Komputerbay 32GB MicroSDHC cards selling on Amazon for about $125 that claim to be Class 6 but so far there has only been one review giving it about a class 4 speed rating. Still if you can live with a smaller brand it may be worth checking out.