Sorry, I am late to this party...
WMO is the official designator of retirement...however any participating member of the WMO in Region IV (Atl and Caribbean) can request a name to be retired for ANY reason... and though this thread was chalk full of US impacts, it will most likely be Cuba that requests the name to be retire, all parties nearly always agree...and so goes Ike. It is my feeling that Gustav will go bye bye as well due to impacts on Cuba as well. Bertha though an interesting and record breaking duration will most likely be used again unless Bermuda makes a big push.
As for follow up names, we are getting very thin in the Male "I" category, but there are a few more English names to fit such as Iago or Igor, etc. Along with every letter, a dialect/historical language group is used. So what will be difficult is finding a German or Dutch male name to fit the 'G' names....I can only think of Gunter but we will see if they follow this other lesser known tradition.
Names have disappeared for other reasons beside affect, take Adolf and Israel taken off the EPAC list a few years back, due to political reasons.
Frankly, I kinda like the way the WPAC counties name their storms... using objects, animals, or flowers, etc. Wouldn't you like to see Hurricane Elephant?
Gregg