Bash on Android Evo 4G

Download bash in your Android browser.

su
mount -o rw,remount -t yaffs2 /dev/block/mtdblock3 /system
cat /mnt/sdcard/download/bash.txt > /system/bin/bash
chmod 0755 /system/bin/bash

Now in Terminal Emulator you can set "Command line" (your shell) from /system/bin/sh - to /system/bin/bash -