There have been many a campaign with promising premises and characters. I definitely miss quite a few myself!
Strat, would you be willing to grant access to Garryl's Power of Cybernetics
modules (by way of the
Activate Module feat)? There are several with neat benefits, and which could be reflavored as a Monk's ability to focus ki (in a way, re-aligning it with incarnum a bit). While I wouldn't choose anything too technological due to the ability to fit in the Generic Fantasy Setting, there are many which would fit with a bit of refluffing. Dark Visor, Hammer Beam, Hydro Guard, Impulse Soles/Temporal Accelerator, Scan Visor (fits the vigilante theme). As fun as the others Garryl suggested would be, it's a bit harder to justify.