engine - 7:57 am on Apr 27, 2001 (gmt 0)

Dmitch - welcome to WmW.
>So, what do think? If my primary site is already listed in Google, should all of my new sites go on a page of links on my primary site OR should I submit my new sites for indexing?

My view is to utilise the links.
Ensure you have inbound links too - especially from sites already well placed in the indexes.
At the moment, the only major engines I will submit a site to (after I have established the inbound links) are Alltheweb (FAST), Google and NL.

Time is a major issue involved here - if you want traffic, and you want it quickly, you have to consider one of the pay routes (whether that be Yahoo, Looksmart or, dare I say it, GoTo). Although, look carefully at GoTo's partners to see who's taking GoTo results.
If you're selling left handed, blue widgets for spaceships, I don't think GoTo is the best route.
If, on the other hand, you're into consumer-type products, then, I'd look more favourably upon GoTo.

If you're happy to wait (and most people are not because they are impatient), use the links.