I hadnt seen this before, is it really good? Can you customise in anyway? For example if I wanted followers in London?
You can use :- twiend.com twitterfall otherwise you can read this article http://technotip.org/60-ways-to-increase-your-twitter-followers/
I have 52K followers. @joehobot it is safe to say that i auto follow 80% of people it is also save to say that i use tweepi.com just to manage my account. refollow.com was good until recently
Twiends is great. Here are some more sites like Twiends. The big thing is that Twiends has a sizeable share of people that keeps the site alive. The alternatives may have a tough time attracting new people.
You can buy followers - check out Fiverr.com - they have some great jobs on there - great for link building too.