The lack of a 3.5 mm headphone jack on both the T-Mobile G1 and myTouch 3G has drawn the ire of many Android users. It has been an indefensible decision on HTC's part for including that 'one-plug-to-rule-them-all' ExtUSB junk on their phones. It forced users to buy dongles (which is available in our store, btw =) ) and adapters that seemed senseless and was always annoying. Thankfully, HTC has realized their error and will now put out phones with the 3.5 mm standard, starting with the Hero. To quote HTC:
The vast majority of devices we launch after Hero will have a 3.5mm jack. Devices that we have already announced but that still come out after Hero will not necessarily be a part of this change.
So ExtUSB isn't done yet, but it sure is close. And for that, we can all celebrate! The tech world is a better place when manufacturers follow industry standards.