My poor TiBook is sick. :-( The original-generation 40GB Seagate Momentus hard drive is nearly five years old and is starting to do some funny things. I could replace it, but 2.5" IDE hard disks are getting harder to come by these days. If the machine died, what would I do with such a drive?
So instead of doing that, I decided to pick up a 16GB CompactFlash card ($70CDN) and the appropriate adapter ($20CDN). The verdict? The machine is definitely quieter, except for when the CPU fan kicks in. I can now use this machine to record MFR without having to hide the TiBook in another room, under the bed, etc...
Faster? It's actually a bit slower on some operations (i.e., loading and caching graphics-heavy web pages) due to the "random write" problem inherent in most flash memory. Most of the slowness, though, stems from the fact that it's an 867MHz G4 sitting on a 133MHz front side bus. :-) But I did this for fun, and if the machine dies, I'll still have a 16GB card that I can use for other things.
If you try this yourself, remember to select a CompactFlash card whose specifications explicitly state that the card fully supports UltraDMA, otherwise you may not be able to boot from the darned thing.
Google "ssd" and "hitching" or "stuttering" for the full story)