i would much rather be sent a cd, i ****ing hate emails with a shit load of links in them.
fair enough in some circumstances links are ok if you had a chat, built up a friendship etc
but my thoughts are if you can't be bothered to send me a nice little demo cd then i can't be bothered to consider it.
also i reckon 3-6 tracks is a nice round figure, maybe a few extra ones at the end of the cd that the label would not consider due to style but might enjoy listening to