There are a few options if all you want is a CMS (content management system) based gallery - with no ecommerce. Of course, if you want it to work with LR - I am pretty sure all of these accept FTP and can be setup to export them directly from it.
I have had Pixelpost a long time ago and I wouldn't recommend it - only for the reason that it is prone to spam commenting and has security issues.
You can alternatively use Wordpress with gallery plugins (There are plenty of choices), or use
www.squarespace.com for an alternative.
Of course, there are other options such as: Foliolink, picaholic, Zenfolio, Smugmug etc. and a whole lot of other choices...
Photoshelter is pretty good option if you intend to sell them online in future...You can start off with Wordpress+graph paper templates for now and upgrade to Photoshelter in future if thats the direction you are heading.
Of course, Live books is a great option - but expensive.
Your other option is to use Wordpress or Expressions engine for blog & to use a custom hosted gallery such as Gallery2 or Coppermine or 4Images or just a banana album for your portfolio images.
You can alternatively just create and maintain galleries in LR and publish them directly on your website as static pages with no CMS.
In short - There are plenty of options!