I think that's an obsolete concern, if it ever really was a valid - at least for home users. Earlier SSDs (from 3 - 4 years ago) were rated at 100,000 writes per cell. You don't have enough time in your lifetime to install Windows 100,000 times. And even if you did, were talking per cell, not per drive and "wear leveling" algorithms in the controller ensure the same cell is not written to over and over again. Read rates are infinite.SSD certainly wouldn't work for me doing a lot of reinstalling cause the life expectancy will go down dramatic.
I'm not sure being as lean as possible is necessary with a 64Gb SSD. I have Windows 7 64-bit and all my hardware drivers on my boot disk and only using 22.4Gb. I have moved my Documents, download and temp files to another drive, and I install all my apps on another drive too so only Windows and drivers are on the boot drive. But still, there's nothing wrong with lean and mean!Especially if that is the only drive you have installed.
I am with you on that one Digs, I have used a 64 GB partition for Windows 7 ever since it first was in BETA. Right now I'm using about 26.7 GB of space and that's with Office 2010 Pro Plus installed with all features. In addition I have another 20 some odd programs and Windows A.I.K. installed too.