Phals come on very long stems so they work great for long, flowing cascades as seen in these two pictures of the same bouquet.
The individual orchids can also be removed from the stems and used as blooms to accent other flowers in a bouquet.
Here the phals are being used with other flowers to cascade down the side of the cake.
Phalaenopsis orchids are a beautiful addition to any flower arrangement. What they don't tell you on the wedding shows and in the magazines is that they are kind of price-y, so keep that in mind when you are selecting flowers and adding in phals. They can be more affordable as blooms rather than whole stems. However, the Sisters philosophy is that the bride should get whatever flowers they want in their bouquet and make the rest fit into the budget. :)