I don't use SSDs yet in the strict sense of the word although in a way I do as part of my "storage strategy". I use flash cards in a card reader for watching videos for instance. Currently mainly an 8GB SDHC card. I copy video files to this card and watch them from that card to save wear and tear on my hard drives. It takes only a few minutes to copy many hours of video to the flash card while watching these videos from the hard drive will require many hours of (extra) hard drive activity. I use my 1TB drives for "long term background storage" and they make as few hours as possible. Only when I want to backup something or want to free up space on the internal 640GB RAID 1 array or want to retrieve something from it I switch a 1TB drive on, make backups, move files from the internal drives to it and copy files from it to internal drives and/or the 8GB flash card. Then it gets switched off again.
Since the only way you can back up a 1TB drive is to another 1TB drive I use few operating hours as a way to decrease the chances of data loss due to a failing hard drive.
Although SSD development is interesting I don't have a great need for them yet. There are strategies to decrease your 'need for speed' that an SSD might satisfy. At least in a desktop. For laptops it's different.
Talking about speed.... If you haven't seen this video
about how you can turn 24 SSDs into a RAID array giving 2GB/sec
throughput you should definitely take a look.
When in doubt..... Press the shutter.