We will be rolling out several small fixes mid-day today (Jan 29.) We do not anticipate any disruptions or problems, but f you spot any unexpected issues after 12 noon (PST), please report them in the designated thread in the DG Site Updates forum.
Looks like everything's coming along nicely! The little purplish flowers that you can't remember are Lobelia. Also I could be mistaken, but your tiger lily looks an awful lot like an iris to me--any chance it was mislabeled? Here's a pic of a tiger lily: http://davesgarden.com/guides/pf/showimage/126095/ Unfortunately there are millions of different iris so I have no idea which yours is.
Your peace lily looks like it's getting sunburned--if they're outdoors I don't think they'd want to be somewhere that they get much sun so if you don't have a shady place for it I'd take it back inside.
For your first garden, you've managed to grow some really nice healthy and beautiful plants. I agree the yellow flower is an iris but such a gorgeous yellow! Now you can do what I would do--say you didn't get the plant you were really after so now you have an excuse to go out and buy another plant, LOL.