I'm gonna go out on a limb here Mike and say two things... #1- I see slight Nitrates. #2- I believe you are cycled (for a very small bioload).
I think you are good to begin adding slowly to your load aas long as you are willing (and it sure seems as though you are) monitor your readings closely and do necessary water changes based on them.
The particles you see when gravel vaccing are not bacteria, they are most likely food particles and detritus.
ok. now newb, would you (if you were in my shoes) try and add a few fish, or try this petco driftwood thing corax and hitman are talking about? i fed them (pretty healthy amount when i came home drunk) last night and i'm not seeing any ammonia.
if you would still add a few fish, what would you put in? (when i'm totally cycled i want angels.)