The 69 cent deal was mainly a marketing gimmick to make it easier to swallow when the iTunes Store raised the price of many songs to $1.29. There was never much of a selection at 69 cents.
The iTunes Store no longer has a link to make it easy to find the 69 cents songs, although there are still a few in the Store.
You may also want to check out Amazon MP3, which tends to have better pricing and much more stuff on sale.
You can buy MP3s from any online source and add them to your iTunes library.