I've got loads of funny responses
1. Hello this is the magic round arbout you are speaking to dougal
2. Hello this is the vatican you are speaking to the pope
3. Hello this is battersea dogs home
4. Hello this is broadmore home for the criminally insane
5. Hello this is toy town and you are speaking to big ears

The list goes on and on....
(TwinkleFuckingToes Has a ingrown toe nail, Thu 3 Jun 2010, 16:52, 2 replies)

My favourite with 'out of area numbers' is...
Hello, and welcome to the 'unsolicited calls assessment service' all calls to this number will be reviewed and our analysis will be sent to your head office along with our invoice for 'insert figure here' - then take the call and tell them how they could improve it.
( JeffTheDogFucker Can you dig it?, Thu 3 Jun 2010, 16:54, closed)

Banana Factory....
...chief bender speaking
(Corbo, Fri 4 Jun 2010, 10:39, closed)

I like this....
Permission to steal?
(TwinkleFuckingToes Has a ingrown toe nail, Fri 4 Jun 2010, 11:20, closed)