Last of the cd's?

Having to prepare my new cd in the last few weeks as got me thinking as to whether I really want to do anymore after this one.
In most cases one nevers hears anything from the recipient of the cd, other than the usual polite "Oh, thanks for the cd" from the friends you send it to, collegues in the industry rarely reply and as for sending stuff out for promo purposes to labels, magazines, websites etc. - you might as well forget it.
It's telling that I've had more feedback and interest towards my music via the mp3s on my myspace page in the past 4 months than anything I've sent out as a Cd copy in my entire career! And since I don't play live - this feedback is all I have.
Obviously its still worth sending out hard copy cd's in some cases - a recent happy accident was Mr Trick from Resonance FM's Rhythm Incursions show (a London-based new music station) picking a copy of my last e.p. that was lying around Resonance's office and liking it enough to want to play one of the tracks on air, props to him - but by and large, most of the cds I've sent out have ended lining the inside of somebody's wastepaper bin.
My current thinking is that perhaps, in future, I'll simply post new tracks (or collections of new tracks) as free downloads on my myspace page (with an archive on the Noisy Image website) - I don't care about the money, it's simply nice to get some sort of feedback - even if it is limited to "Nice tunes, mate!"