Hi,
Yeah it's hard to believe that's almost 15 years ago already.
I cant remember when i first encountered the chip myself. I can remember some other ones though, like the ua701 if anyone remembers that, or the ua709, and Intel's 4004 processor, a 4 bit central processing unit (CPU)!
The 723 voltage regulator was a big one too and that was used in a lot of stuff. There were two somewhat different versions with two different kinds of voltage references built in. Not sure if there are still two or not.