In a LITERAL case, Steve Little voices Brother dung Beetles Chip and Skip.
Doug Lawrence voices Edward, Dave, Ping-Pong and Nurse Leslie.
Throw It In: According tothis (under Scoutmaster Lumpus), the entire ending of "Lumpus' Last Stand" (wherein Lumpus is revealed to be the fake scoutmaster, playing impostor to Heffer, who he locked up, and is thrown into the insane asylum) was thought up by Tom Kenny during a recording session. Joe Murray decided to use it because "It tied up his character well."
Keep Circulating the Tapes: A VERY VERY RARE Press Kit has a DVD of the first two episodes, Season one has been released on DVD but only for Region 4 and it's region locked, two episodes have appeared on the Cartoon Fridays DVD and a Christmas compilation. Thankfully the entire series can be bought off iTunes.