I have news about an app that works well with the m860, it's called setexperia. This app can over/under volt this phone, as long as it's rooted, and rom'ed. You can set a swap file, remount with noatime, set the I/O scheduler, and a lot more! I know it's meant for Sony phones, but there doesn't seem to be any ill effects from using it on the M860. Using Autorun manager, and titanium backup, can make this a very responsive phone.