"Smart" Optimization
1. Firstly - please change the captcha method on your forum, I've tried 4-5 times on registration and each of the search forms before I found one I could read ("Z" looks like "2" or vice versa, "4" could be "p" I think, "5" and "S" are the same, and many letters are invisible, etc.)
2. A suggestion for deep optimization - please add a decent chunk of empty space after large, frequently-used files (e.g. Outlook PST) - the whole point of a deep optimization I presume is to place the more frequently used files at the front of the disk - but if the next files are contiguous with a few large files then additions to (or expansions of) the file will end up near the end of the disk, which is certainly not optimal. The head will have to span the entire disk to access regularly-used data.
But if, say, 20% of the size of each file were left free immediately after its location on the disk then it could easily expand into it and still stay relatively defragmented. (I suppose this might be a bit similar to the UNIX file system, which makes defragmentation mostly unnecessary.)
Disks are huge now, so there's no reason to pack all the data into one corner of the disk. Allow each file to have room to grow.
There should also be an option to disable this for certain (configurable?) fixed-length files, such as movies and music files. I suppose these will end up near the end of the disk anyway - do you optimize according to the most frequent change date or the last access date? It makes sense to move large movie & music files to the end of the disk (without expansion space) and "working" files to the beginning of the disk (with empty spaces to grow into).