Update: Following some advice, I changed the fuel pump relay ($25 @ ***************). This appears to have solved my initial two problems mentioned above (i.e. revs the RPM's while at a complete stop; or cuts out during acceleration or at speed), but now the car is suffering from two new issues:

1) Immediately after starting car RPM's fluctuate up and down (is "hunting" the correct term?). No roughness to it, just constant fluctuation between 500 and 1,500 RPM. Upon shifting out of "Park" this goes away, but returns upon next ignition start.
2) Upon heavy acceleration (usually from a complete stop) the engine will hesitate (maybe rumble a little) then kick in. No hesitation at normal throttle while moving.

I researched these issues and thought it may be the Overload Protection Relay so I replaced it ($58 @ ********az), which doesn't appear to have helped. I finally pulled the codes which revealed P0301 (misfire cyl. 1) and P0101 (MAF discrepancy). I'm hesitant to include the codes on this posting because I don't know how old they may be and I'd prefer advice based primarily off of the symptoms rather than codes (FYI... per previous post I did clean the MAF, but only want to replace as a last resort $$$).

Thanks again for your help! All of your advice is very much appreciated and I feel that I've already learned a ton from y'all about DYI car repair. Please let me know if you have any ideas on the new issues.

Thanks,
Sideshow76