Precisely. First of all, Google searches are not case-sensitive. Quote from Google:
So, vB or VB or vb or Vb does not make a difference as far a Google goes.
With regard to VB as related to visual basic, yes, Jelsoft and vBulletin have not yet surpassed Microsoft, laughing out loud, but that does not mean that vB is not a brand for Jelsoft or could not be trademarked. In fact, I just searched TESS at
www.uspto.com and noticed that vBulletin was not trademarked (Jelsoft, I would do this immediately if I were you) and noticed there are lots of vB trademarks (I would trademark this for virtual electronic and on-line communties if I were you). You greatly improve the strength and value your brand(s) by trademarks.
Just because VB is a brand for a programming language does not mean that vB is not a brand for virtual communties. Both can co-exisit as trademarks. Good Coders are not necessarily the best business people and the reverse is also true too!
PM me if you want a great TM (intellectual property) attorney in the US. I know one of the best with one of the top firms in the US.