Nice... been using some of the articles submission sites that was included in your list; surely i will try the other sites... thanks thanks:
In addition to your your list, i'd like to share few of the articles submission sites sites that i've been using:
1. HUBPAGES
2. ARTICLESBASE
3. EHOW
4. SQUIDOO
5. BUZZLE
all 5 are for unique articles....

1. articlealley
2. prlog
3. articlesnatch
4. searchwarp
5. articlecube
6. articlesfactory and lastly
7. articlecity
Hope my list would help...
Thanks again.