APLX is an APL2 implementation for various systems: Linux, Windows, Mac OS X. Unfortunately, it's a bit expensive - there's only a cheaper Personal version for Linux, otherwise there's only an Evaluation version for Mac. And how they solved the problem with the APL special characters is not mentioned there - presumably via combined keys or something similar. I wouldn't know if there is an APL-USB keyboard.
Somehow, I would like to play around with APL again - the language is wonderfully crazy and has a few corners that even today (except in languages like J and K of course, conditionally also in Sisal) can find their match. Specifically, the ability to process entire arrays of values at once and combine them with powerful Higher-Order functions is really exciting.
J is now also available in an OS X version, unfortunately only from 10.3 onwards. Would be another alternative, J can be considered as APL-in-ASCII (although it offers a whole range of improvements in language theory compared to APL).
Funny thing, this: suddenly my PowerBook refuses to play sound. Nothing comes out. I can adjust the settings as much as I want - no external sound, no internal sound. Not even the system start gets its sound - everything is mute. Resetting Open Firmware and resetting Parameter Ram didn't help either.
I had already had strange phenomena with the sound: every time the internal sound wanted to make the system block briefly at the first attempt. As if the sound chip had some kind of problem. But that should be noticed during the hardware test of the motherboard - nothing, the test runs smoothly through. Damn. Ok, I have Apple Care for such purposes and will simply call them and then probably at some point take my PowerBook to the dealer for repair - but in the meantime I won't have a computer at home and that's annoying. Ok, I have the company Mac and I'll probably make it ready in such a way that I can simply carry it back and forth between home and work (a Mac Mini is luckily not much to carry), but it's somehow annoying when something like this happens just because of stupid sound stories. But I also don't want to give up feeding the system from iTunes on the computer ...
The Time Zone (WP Plugin) is a handy little plugin that uses the time zone in WordPress so that the somewhat silly adjustment of the time difference in the options can be omitted. Found at Perun in the comments.