Interdomain linking from partner sites

[ElizaDay]

I'm looking for a bit of advice on best practices when it comes to linking domains that are operated by the same umbrella corporation.  Are links from the header/footer no longer beneficial?  Is there such a thing as too many links among domains?  How would you reap the SEO value of a small network of sites that were associated?  Thanks!!

[EGOL]

**How would you reap the SEO value of a small network of sites that were associated? **

Merge them.

[ElizaDay]

That isn't possible.

[EGOL]

Put all future work into one and allow the rest to drift.

[ElizaDay]

Not sure I understand what you mean.  Maybe I did a poor job of explaining.

The sites are different enough where they merit having their own domains but they do share a common theme.  I only manage one of these domains but can get the others to link to us.  I'm trying to determine how they should link to us.