^^ Agree with the whole "ram disk" thing. Tons of research and development has gone into file system development, and part of that includes file "caching" and prefetching. Unless you have a ton of evidence that your file system configuration is bottlenecking your performance (say, perhaps with a database, or perhaps in some rare instances a photoshop scratch disk), you're probably making you system less efficient and slower.
The whole "saving write cycles" is also mostly a fallacy - the OS file system already attempts to minimize writes to improve performance though write-back type caching mechanisms. Of course the OS "obeys" programs that demand immediate writes to disk, because the OS knows that RAM is volitile. RAM disks are once again attempt to short cut a fairly intelligent system.
There are cases where a RAM disk makes sense, but as file systems progress those instances are smaller and smaller.