I really must agree with GAR. You should not be pretending to have a full product (and taking money for it) until a FULL PRINTABLE MANUAL is available. I don't know how you've got the nerve to sell half of a product.... Now how to figure out how to get my money back!!
I too think that a PDF manual is a necessity. Thumbing through a printed document is MUCH more quick, easy and natural. My 63 year-old eyes (and brain) resent jumping around in a bramble bush of links.