Interresting website (with slow loading webpage though...)
It enlist every Speeders in game, also interresting to read the comments added like prices changes and such with the very soon Game update to come...
At bottom is said some big sized speeders will be removed, they seem to be reintroduced later with less lag generation.
The current speeders will remain in game, they just disappear from vendors.
Link : http://www.hotrodacc.com/swtor/speeder.html