No. Please don't prod the OP of a question asking him to accept it.
The only exception to this general rule is when the OP comments "Thanks! it fixed my problem" and you see it before it gets too old. In that case I usually leave a friendly comment alone the the lines of
@OP If this answer has solved your problem please accept it so others know the problem is fixed. Thanks!
As this question in particular is rather old however, I don't think there is any point in poking the OP. The community "accepts" an answer with votes and the system sees it as answered so it's not a big deal..
A "Community Accept" feature has been discussed very often already and I don't think it's a good idea.
Would it be possible to have a "community accepted" feature?
Community vote for "Accepted Answer" (Rep. >= 5000 only)
Can we consider community changing accepted answer?
Feature request: moderator ability to accept an answer
Feature Request: "WAKE UP and accept my answer please"
If you find an answer that is exceptional, consider giving it a bounty.
And, remember, you should always upvote a good answer!