I’ve made a few tweaks to TwitterSA, and I’m considering it “Done for now”, while I move on to my next project. A brief summary:

AJAX version works! (Tested on FF3, IE6, Safari, OS:XP) - It’s now the default
HTML-only version here, in case AJAX doesn’t work (proxied Vista seems to have issues)
Minor CSS tweaks
Hashtags now redirect [...]