The latest I have read about it is that for dial-up users, M/Soft will offer to post you the SP2, including free postage! Much the same way they provided SP1 for XP, except that anyone could order a free CD for that one. It was also said, speculatively, that, yes, magazines may be given the right to put it onto their cover CDs.
It seems most likely you will be able to get it without the bind and cost of using dial-up, particularly as I gather it will be a very large download.
If I were you I would ignore the problem for now and go out and buy XP. It may be a little while after SP2 is released that it is incorporated into XP discs on sale, or provided by OEMs.
Nobody has expired, been pointed out as 'Mr Old-fashioned' in the street or been taken by Aliens because they have not got SP2. We seem to have managed OK so far and if you want to get XP, learn about it and await the CD update.