I was checking out newegg.com and I see that they now have both 16 gig, ~$70, and 32 gig, ~$150, x233 CF cards. I have couple of 3.5" 9 gig IBM SCSI disks in my basement from about 10 years ago. Technology is amazing.
My 8 gig CF card stores ~567 RAW + Small, regular, JPEGs. Given the advances in storage, and the time to convert RAW to JPEG, I am now shooting RAW + JPEG for everything.
I might upgrade to 16 gig and it was only 8 months ago that I upgraded to 8 gig from 4 gig. I don't know if I would want to put all my eggs in one basket by using a 32 gig card.
An other interesting storage option is the thermaltake.com BlacX or BlacXse. They are USB 2.0 & eSATA docking stations for SATA hard disks. Take any 2.5" or 3.5" SATA internal HD, plug it into the dock, and now you have a USB or eSATA external disk. Now you don't need to keep buying the external enclosure when you need an other external HD to back-up your files onto. The downside is that the internal drive isn't in a carrier so I would think of it more for brief usage while I copied files to the external drive rather than a continuous usage external drive.