In my experience, if you link to each other Google will usually only list (rank) one (if they deal with the same subject - which they will). If you just link one-way you usually will get both listed.
_________________________
For the non-do-it-yourselfer! Proven effective managed
Promotional System / Websites for Realtors - Some areas available that offer some pre-existing top 10 search engine positions!
18 years as a practitioner of SEO. Visit my
Realtor websites blog for maintaining a successful online presence.