I loved the jokes and the animations fit perfectly with them. It added that extra "Look what's going in my mind while I'm telling this joke" which adds a lot to the funny.
Same style as your "Greg's Officemax Freakout" which is a relatively new and very promising style (not many flash artists that try successfully portray the radio jokes).
Only negative point would be an error on the radio show's part: The woman's voice is way too nags so much. Nevertheless it doesn't make the joke harder to get.
Nice "old educational movie" style you put there, it fit well. Keep it up! These flashes rock (if the joke is good that is)!