Are there different speed smart media?

[Byte]

I see some have 8x and thats about it. I know Compact flash has tons of different speeds that sometimes really do affect performance, and know Memory Sticks are generally very fast. Are there any super fast smart media cards?

 

[Byte]

?

 

[Howard]

Sandisk's Ultra line of CompactFlash cards are faster than their non-Ultra SM cards.