Very quick question just as I'm skimming Augmentation. Since there now exists a biological ultrasound system (enhanced hearing, vocal range enhancement, echolocation), can an adept now take ultrasound as an improved sense?

It's always depending on the GM, even with standard Ultrasound (since similar methods already exist in nature).

If you go with a strict reading of the rules, however, it doesn't matter. Improved Sense only grants the listed powers or senses duplicated by cyberware (and thus not bioware, nanoware or genetech) that doesn't include radio or other technological phenomena.

It's that last part that just leaves it all weird since, by definition, all cybernetic senses are technological phenomena. But to each their own.

Summary: Ask your GM.

Ahh, right, I forgot it specifies cyberware only. Thusly, no improved ultrasound by RAW. Darn.

Sure, but it's rather silly that everyone in the Sixth World forgot how to build ultrasound capable cybereyes after the Crash 2.0.

Also although I hate to use them in my arguments because they aren't up to snuff, but one of the sample characters has them installed in his/her cybereyes, but I freely admit that it proves nothing by itself considering the state the sample characters are in.

Yes, but it works through "radar or other technological phenomena" which is a no-no for Improved Sense, silly as it is. I don't know a decent GM who doesn't allow it, though.

Echolocation. Gotta love it.

...seems kinda silly when and adept can...

...generate fire or electricity from her bare hands
...hit somebody across the room with a punch
...walk over deep snow without sinking in (at least they can't do this on water...yet)
...change the shape of her face at will
...change the colour of her hair and skin at will
...see in the dark better than a cat
...sniff out scents better than a bloodhound

...yet they can't get the ability to echolocate like a bat? Even elves with those long pointy ears?

1) It's an ear, not an antenna.

2) Nobody said no. Personally, I'd restrict it to passive ultrasound but that's just me. If you want a blind adept on a bicycle making clicks with his tongue, that's your bag.