the "elcheapo" amp i built has everything but th ein/out jacks, and a battery connector. i was severly chided for owning an amp with distortiopn figures as bad as 0.2% a while back. i prefer the sound to some "very highly regarded" portable amps i owned.
if you feel like moding:
i would reccomend removing the 2 input caps, and replacing with 100-300ohm resistors, removing the caps in the feedback path (just jumper) and run the sneze out of the board. ooh, also change the gain, 10 is WAYY too high. 7 is a fair bit too high. 5 may not be stable, i have not tried. replacing the single 10uf psu cap with a larger one (umm, use one off of the feedback caps... heaven forbid i spend more than $8 on this board) is a very welcome change.