Samsung Galaxy S disconnected during Kies firmware download The phone will not work at all now and only shows an icon depicting the phone and a pc connected with an exclamation in the middle. I have taken out the battery etc but to no avail. The PC now doesn't recognise the USB connection.  

What do I do now?
From the comments it sounds like you've gotten back to Download Mode, so that's good.  If not, try different button combinations in conjunction with battery removes and being plugged/unplugged into USB.  Something should get you there.

Once you're in Download Mode you're probably going to need Odin to fix your device.  You can use my instructions here for Odin.