@knc1: SFTP, yup. FTP/HTTP, I *think* I included the applets in my busybox builds, but they're not 'plug and play', you'd have to start them manually

.
EDIT: Yup.
Code:
grep -E '(FTP|HTTP)D=' Kindle/Misc/busybox-1.22.0-config
CONFIG_FTPD=y
CONFIG_HTTPD=y