Try Michaels Bromeliads. Link below will get you to his cell phone. Good prices, quality plants and good info.
Cascading on wood, in a pot?

Here is a link that might be useful: Michaels

Neoregelia "Fireball" is a good small plant for multiple groupings. Good pictures can be fount on FCBS.org

Here is a link that might be useful: FCBS

I agree about Michael. I get most of my plants from him. Take a look at Aechmea aculeatosepala on FCBS. Michael has a great price. Good luck.

Thanks for the suggestions! That aechmea is very interesting!

Tillandsia butzii (viviparous form) grows pups on it's leaves and cascades nicely.
Tillandsia somnians.

Gonz I tried several times to grow somnians but no go...and I love the look of the plant ;(