I am glad to say that this forum works 100% with the DSi web browser.
Though it is a bit slow. (It is probably my 2MBPs, yes I know it is bad.)
Anyway...
All the emotions work fine, so does the recent topics feed.
So all in all I am pleased with the result of the forum along side the DSi web browser.
p.s. I am posting this on my DSi.