I've been looking into changing up the primary (and only) disk in my 2 year old Mac Pro to a Solid State Disk (SSD). Based on what I've seen on the new Mac Airs I think it will boost performance a lot more than adding more memory would.
The problem is that these beasts are pretty expensive, so I am not going to replace my 400G Hard Disk with a 400G SSD. Instead I will have a much smaller SSD to boot from and run from, and leave the larger 400G to carry the load of large files that I don't use a lot.
Here are a bunch of useful links that I have gathered in case you are thinking of doing the same:
- Apple Stack Exchange thread
- Make a bootable Lion disk
- Using Lion with a mixed SSD/HDD configuration
- SSD and your home directory
- Moving your home directory