For the past week, I’ve been toying with two different recommendation systems for Twitter. The site’s own recommendation engine, “who to follow,” displays a couple of suggestions on your homepage sidebar, a “you may also like” list after you follow a user, and extensive lists of recommendations on the “twitter suggests” page.

So far, I’ve been pretty pleased with the “suggestions for you” recommendations. These are based on who my Twitter contacts are following, so it makes sense that I might be interested in users that are followed by several others in whom I have already shown an interest (=I will like people that my friends like). The “Browse interests” feature on the “Twitter Suggests” page is a bit broader. Due to the sheer number of Twitter users, it is as difficult to pick out interesting users on this list as it is with a topical search. These are also organized by follower count, so you have to wade through a lot of brands and socialebrities to discover anyone new. Like most of Twitter, features are limited and there is no way to keep track of users you have been recommended but have no interest in.
As far as the pair of sidebar recommendations, I think that’s really just a way to get you to click to the main feature. I haven’t seen any good recommendations there but it does infuriate me that I can’t right click to open the profiles in new tabs. I would probably click through to the profiles more often if I didn’t need to leave my Twitter homepage to do it.
I’ve also been checking out a service from SocialOomph ( a site that I really like for tweet scheduling) called FollowerHub. It’s a bit complicated to start but basically it’s a platform for buying visibility in the site’s search results and finding users to follow. First, you put a bid down on keywords related to your profile. When other users search for those keywords, you will appear in the results in a position relative to your bid (I think). The search function is quite well done, allowing advanced search syntax, tons of profile filters, the ability to automate search frequency and to organize users found through the search.

Searching costs 10 credits which is 10 cents. Following someone that you find on Followerhub through a search also costs 10 cents. Appearing in search results for others costs whatever you bid for that specific search, which can be as low as 1 cent. All users get 500 credits free to start. The system lets you track who you have found/who has found you through the system, as well as offering a platform for follower management in general. You can create organizational groups, take Twitter actions (follow, unfollow, block) and also add notes to user profiles, which could be very useful within the groups feature.
Now that we’ve found a bunch of new people to follow, how can we get rid of all of the old, boring ones?
I really like ManageFlitter. The service shows you which users that you are following are inactive, too active, and whether they are following you back. It would be great to be able to customize the filters (like finding users who tweet more than 10 times per day) but this at least gives you a list that you can work through to trim down your list a bit. I got rid of some users that have clearly stopped using the site, although I kept several that I hope will wander back to tweet someday.

Know any other good services for finding (or losing) Twitter users?