diesel: "now $42 is the price to beat"
I realize that this thread is stale, so maybe you're not watching, or you've found a different solution. But just in case, I thought I would mention this. Harbor Freight has a DMM with a dwell feature:
http://www.harborfreight.com/cpi/cta...emnumber=95670
$32.99, plus shipping (about $8, unless you walk into their store).
I just got it, and it works fine (set to dwell) for monitoring my injectors (VX). Also works fine to monitor my O2 sensor (although I can't monitor my O2 and my injectors at the same time, obviously).