[link|http://www.iht.com/articles/ap/2007/09/19/africa/ME-GEN-Gulf-Rate-Cut.php|IHT] and [link|http://www.dailytimes.com.pk/default.asp?page=2007%5C09%5C20%5Cstory_20-9-2007_pg5_17|Daily Times].
Even if inflation weren't accelerating in the Gulf states, I don't think it necessarily follows that the dollar would collapse if SA ended its peg. While they have large dollar reserves, [link|https://www.cia.gov/library/publications/the-world-factbook/geos/sa.html|their economy is small] in the greater scheme of things. What's happening in [link|http://economictimes.indiatimes.com/Markets/Forex/Re_at_9-yr_high_on_fund_inflows/articleshow/2385179.cms|India and China] may have eventually more of an impact on the dollar as a reserve currency.
Cheers,
Scott.
(Who isn't an economist, either.)