...been a few days since I posted some pics and made a real update so here goes:
This Saturday (tomorrow) will mark the one-week anniversary that my pico has been up and cycling. Even within the last six days or so, my girlfriend and I have noticed changes in the tank... and more specifically, with our pet rocks.
Almost overnight, it seems like we may be getting some algae. Nothing extravagant or unruly... but you can clearly see in the photos below that the rocks are more brown in color. I've been leaving the lights on for approx. nine hours daily. And in lieu of the brown growing all over the rocks, I have noticed some other growth, as well. The coralline algae does seem to be getting more prolific throughout the tank... or at the very least, growing back where it once used to be.
Certain sections of the rock on the far left are very purple and deep red. There are a few small purple things on the rock (eloquent, I know)... they almost appear to be very small polyps of some kind? It sppears "squishy" for lack of better terms... so I don't think it is coralline, but perhaps it is.
See photos below.
My intent this evening after work is to go to the LFS and buy more RO/DI water. I'm going to deem Saturdays as "My Pico Maintenance Day" and do a 20% water change tomorrow. Probably a little more than 0.5 gallons of water as best as I can tell. I'll check the water parameters shortly thereafter and see how I'm doing after that. I'm under the impression that I may not have had as large of a cycle as I was initially anticipating based on the live rock I purchased. Not that I think it is "super duper premium uber-quality" live rock... but because, it was sitting in a large tank being blasted by several powerheads for the last 5-6 weeks at the LFS I purchased it from. But also, I do like the quality of my live rock.

It's amazing the little things you notice everyday. It seems between my girlfriend and I... we notice something new every day.
Also, I really don't think the evaporation rate on my pico is that big of a deal. In the grand scheme of things, I'm not jet-setting out of the country for months at a time. And if I wanted a hobby that was completely self-sufficient, I certainly wouldn't have purchased or planned on setting up a mere 3-gal. reef tank. If you want a pet that is self-sufficient, go buy a cat.
I probably had two gallons of water remaining in my 7-gal. blue jug as of last week Saturday when I set the pico up. I've been topping off with fresh RO/DI water since then. And I know I still have at least 0.5 gallons left. Maybe a tad more but I doubt much more... at any rate, dumping a cup or two of fresh RO/DI water in the tank when I come home from work at night isn't that big of an ordeal to me. Again, if it were... I wouldn't have even begun this project.
Enough with the blabber. Photos?? ...you bet.
*most of these are with the tank lights off*

* in the center of this photo, you'll see that piece of purple whateveryouwannacallit. I've no idea what it is. But it is definitely growing. It looks like a polyp of some sort but I could be wrong. But again, it is growing at an alarming rate!

*

* here is another shot of it from a different point of view. It's in the upper/center portion of this photo. See those little "things" that sort of stick out. Almost like tentacles? ...it's very bizarre. *

* more photos of our rocks turning brown. lovely. one other thing I wanted to point out... look over in the cave on the far left hand side of this photo. See that weird gray looking thing?? ...almost looks like a starfish with a couple of legs propped up inside of that little hole? ...that thing moves, too. I don't know what it is. But it is definitely "alive". I'm scared.

*

* I suppose you could call this my FTS. I just call it "brown rocks". *

* ...and finally, here's a photo with the lights on. *