This is a centerpiece I found on a website called save on crafts. They sell vases, and many many other craft supplies. I liked this centerpiece because it's so simple to put together. I think a little bear grass submerged inside the vase would really bring it off nicely. One could definitely get by with fewer flowers too.
I found a lot of great options at fiftyflowers.com and their prices are the best so far from online flower companies I've looked at.
This is one part of the wedding planning I'm looking forward to (aside from the whole getting married part).
Next up are two pics of bouquets I found on the Martha Stewart website. Tulips and callas vs. delphiniums. Those are all beautiful.