The thread title says it all. How do you develop permanent links to internal category pages? (besides the obvious "buy them.")
I have a few site hosted on the same ip and I never seen a problem with it, pr is still good and so are the rankings. But do not over do it. I only have 3 right now with a 4th one coming in the near future. I'm sure you will be fine if the number is low.
if you can afford buy blog post. if you cannot comment on blogs instead. there are also free directories for deeplinks.
If you goto the directory announcements forum, alot of new directories accept anything, so theres one way. And another way i find is good, i have about 20-30 websites, different niche's, so i tend to put a visible link back to linksjuice.com to the most relevant category. That way the customers on linksjuice.com get some traffic and i get links
I usually do links with different anchor texts from my own blogs, hosted on different servers. However, another technique is to utilize every free hosting provider you can, such as Blogspot blogs, Wordpress, etc....