This is a fascinating topic. I haven't been part of too many contests on indiblogger nor have I actively solicited votes for posts so I don't know how much canvassing for votes or buddy voting helps. Here are a couple of my thoughts.
I have realised votes often pour into posts that are currently in the top 10, primarily due to visibility. The patterns of voting that I see on Indivine makes me conclude that people read the top 5 posts, vote for them and move on. unless their posts are somewhere down at 20, which is when they go through other posts above and below theirs.This means that newcomers trying to get their work seen face a pretty rough draw. Its normally bloggers well-known on the Indivine circuit who make it to the top, others never get the chance of breaking out of 20 votes and more. This is unfair. Mostly when some posts at the top, I feel, don't deserve to be there over others which are far better that are languishing with just 10 or 12 votes.
Ramchandra's idea is excellent. It takes the weight off reciprocity that many bloggers suffer from. More importantly, it gives a better idea of which posts were better received without having to cancel out one's blogger buddies as being the regular votes.
Sanchita's idea of increasing visibility is an easily achievable layout change, isn't it? That means more blogs are seen. Adding to her suggestion of using up the empty space, I think if there was a mechanism to promote maybe 3 blog posts that have been getting a lot of traffic through indiblogger( not votes)could be shown, I think that will be an added incentive to read them. I'd be happy to be directed to good posts by totally unknown people. I have literally stumbled upon some great posts that I had no clue about through a link from someone else'. I think Indiblogger can help new comers more that way.