i've found them great. i have several sites without content yet in the top 3 search results for their relevant keywords - just from a NP sig link.
one thing for starters to keep in mind is the different uses between an in-post link and a sig link. eg
is one (pretty insignificant value) link. most good blog comments will probably do better.
but the same thing as a
sig is 800x (or whatever your post count is) links. the problem with the latter is any benefit will just as quickly drop away when you change things out of your sig. blog links will stick around.
my plan is to use a sig as i'm developing, and then after just to the point where good content can get noticed by enough people. after that, it's on its own!
by the way, does anyone know the going rates for renting aline (or four) of someone else's sig at NP - or other forums? is it based on their post count?
