That website "the knot" is cool. Also look at Fifty Flowers.
I did the flowers for my nephews wedding last May, though we paid a pro to do the arch over the altar, and boy am I glad we did! I did the bridesmaid bouquet, corsage/boutonieres and many bouqets to line the aisleway.
We did this cute thing where we bought cheap canning jars, put oasis inside them did the bouguets, then wrapped them in ribbon ( a really wide , like 5 inch wide satin ribbon) and closed this wrap with pretty orange headed pins. Then we wired the top/lip of the jar and "hung" them from the folding wooden chairs on the aisleway (everyother chair) used Tulle to kind of fluff it out. Looked good until the wind blew the fluff here and there .