In regards to the Special Agent position, it is a LONG and tiresome application process. I submitted an application about 2-3 months ago, received an invite to take the Phase I exam last month, took the Phase I exam last month, received a letter stating that I passed Phase I and to stand by until notified of Phase II testing.
When we were at the exam, the special agent recruitment coordinator told us that on average, it takes about 1.5 years to get beginning training at Quantico should you pass all of the Phases of selection. It's pretty ridiculous, if you ask me.
They are trying to expedite the process in the future by setting up testing centers, however, this concept is just in the beginning phases and will take time to develop.