Hi Ruben,

You may wish to investigate Telstra iCall Waiting.

I dont know about its Mac suitability, but have a read through:

http://telstra.com/comms/icallwaiting

Also, the pending V92 standard is supposed to allow you to put your 
modem "on hold" to take a call. Check out http://www.v92.com

Regards

Trevor Lee
Highway 1 Internet Solutions

ps. ADSL can solve your problem :)
http://www.highway1.com.au/adsl


--- In [EMAIL PROTECTED], Dark Servant <[EMAIL PROTECTED]> wrote:
> I was wondering if anyone knew of any Mac programs that allow you 
to answer
> phone calls while you online or programs that allow you to answer 
phone
> calls on your Mac.
> 
> Ruben