Linux distro that is USB install friendly without a loopback/casper?
Besides Puppy or DSL, is there a full "regular" Linux distro that is friendly to be installed on a USB flash drive that won't wear it out? I want to be able to upgrade it, not just keep minor persistent changes like the methods outlined in pendrivelinux.com. The loopback file would fill out too much if I actually did a apt-get update, so I want something that installs natively on a USB flash drive with EXT3/EXT4, etc. However, is there a distro that sends the log to a tmp ram drive, for instance? Something made *not* to wear out a USB drive too fast?
I want a truly portable Linux on a UFD, not a semi-attempt that uses casper.