Version 0.6.7 is available. Barnacle 0.6.7 should work on HTC Evo and, with some extra work, on Aria and Liberty (and possibly Desire) as well. For Aria/Liberty you will need to download new firmware for your wifi driver.
Download fw_bcm4329.bin to
/sdcard/. You probably won't be able to download this on the phone (due to the .bin extension) so download it on your computer and then put it on
/sdcard either by mounting the SD card via USB and copying the file over or via adb:
adb push fw_bcm4329.bin /sdcard/
Unmount the SD card (it needs to be unmounted from USB in order for Android apps to read from it).