Samie Here,
Many of you may know by now but seolinkvine has closed its doors. What ended up happening was that the network grew extremely fast with a large amount of articles being submitted by members.
Brad decided that it was best to focus on making the seolinkvine experience better for his current members rather than continue to add new members.
If you are hoping to sign up once he opens up the network again, then I suggest that you click here to get on the notification list.
In the mean time, if you are looking for alternatives, there are plenty to choose from.
Another service very similar to seolinkvine is Article Ranks. What I really like about this program, is that there is a free and paid option (something not available in seolinkvine, at least not in the link building portion).
There are three ways that you can gain access to publishing articles and getting relevant links.
1) Add your sites to the system and earn credits for each article that gets published on your site, which can then be exhanged to allow you to publish articles. (site must have PR 1 or higher)
2) Buy individual credits, this is great if you are only planning to use the system say once a month
3) Upgrade your account to monthly subscription, pay a small fee and have unlimited publishing access.
I am currently a free member, and using it in conjunction with other link building services.
The thing with SEO, is that you need to have links from as many places as possible. Not only that but relevant links in my opinion count a lot towards helping sites move up in the SERPS. Link diversification among other things, is key to getting top rankings in Google.