If you can, an MP3 is better...  better quality for one.  If you do send an MP3, you don't have to send it with ultra high quality...  

 Try this:

Encoding
Bit Rate: 128 kbps
Sample Rate: 44.1 kHz
Stereo Mode/Channel: Joint Stereo

That's what they use for specs over at podiobooks, and it'll be fine for here... 

So have at it junkies!!! Just don't go overboard and record 20 minutes of crap!  keep it about the same length as your phone call would have been.  And unless you really (and I mean really) know what your doing with effects, avoid them.  Nothing would suck worse then having to listen to soem incomprehensible garbage cause your reverb/gverb/or whateever verb is off...

SynapticJam on Toast - hhhmmm... tastes like chicken (aka PUVJK) #2 in crack hits (Special?  Ain't I just)

S.H.I.T. Award Recipient and all-around uberjunkie! 

 Good call on the effects. Can't tell you how many people do NOT know what the frak their doing. Unless you're positive you know what you're doing, record a cappela.

"They say it's better the second time; they say you get to do the weird stuff."  -Captain Hammer

Because recording an audio file mean you can fix your goof-ups, which is impossible to do when you're calling in on a voicemail line.

Mildred

 Some of them let you re-record, which is super cool for those who don't have the ability to do MP3s.

Thank you, George Hrab, for composing and performing the acoustic version of brainsbodyboth. Humorous yet poignant, and you gave me a theme song. I miss Ally <sigh>