Up until recently, SD memory cards were transferring at approximately 2MB/sec. ADTEC of Japan just released specifications on their new SD memory card that will triple the current speeds by transferring at an amazing 6MB/sec. This isn’t the only positive side to this card, they are now also water resistant. Based on the specifications given to us, they appear to be the same physical dimensions and weight of the previous cards.
These cards are available currently in Japan, ranging from 32MB up to 1GB in size. They can be used in most of same the devices as their non-water resistant predecessors. No news yet on when they will be available worldwide.