I think the correct URL shd be http://www.bird.ch/bharms/asr_sh00.htm, or as depicted in the link published by FBWless. Or you can just type http://www.bird.ch/bharms and it'll redirect.
The mailing list option is an excellent thing - Bill will notify you (if you sign up) as and when he make chages to his site - usually once a month. And, sometimes he send you "extras" directly too - like the list of abbreviations he's used in his list.
I think the web design is simple, short and sweet. Nothing fancy really (as Na said), but still pretty good.
And Bill (Harms), if you happpen to see this thread too, excellent work! Kepp it up!