You were already at the right place :-)

http://deadlock.com/promote/software/artist/

> I am interested in obtaining the best prog for site submisson,
>and as mentioned in other threads, one that is constantly updated is
>essential.

Promotion Artist has an auto update feature, you just connect to the
remote server every so often and download the latest list of sites.

> There is also another program, or service that supposedly
>creates "mirror" pages with different keywords.

P.A. does this, if you want it to.

> The prog is called
>"Webseed" and is $99 per year for unlimited submissions.

P.A. is $99 - period. Everything is unlimited.

I don't know
>about this prog but these guys leave alot to be desired on their site.
>Many of the informational links don't even work, (like the step by step
>link) so I wonder if this is a reflection of the quality of their
>service.

You can count on it.

>Whats the best prog for creating screensavers?(for distribution).

Not too sure about that one...