Today's consumers are spoiled too much...
But i would agree that leaving out an expansion-slot is just not very smart...as storage needs grow more rapidly than the need for a new device (i just love my TyTN II, and it'll service me for some years to come with 8gb Micro plugged in there).
But as for the audio-connection.... I don't understand all you people in bashing HTC for coming up with this solution. To be frank, i've written off quite some WM devices since the dawn of the OS in 1997 somewhere, and NEVER ever has an 3,5 audio-jack survived the entire lifetime of the device. These stone-age audio-jacks just break internally after some hundreds or thousands re-connects... Doesn't anyone see that HTC has actually fixed a major problem here? (and also making devices smaller in the process, since only one connector services all needs!). I applaud them for the ExtUSB jack, and their innovative phones which i'll keep using for many years to come (that also goes for my trusted Trinity which is my backup).
Think about it... How long did your 3,5mm jack survive? And am i the only one out here, or does anyone agree on this?