As of late November 2010 I am changing how the disclaimer will feature in my posts - The statement used most often will be the one below
product name was provided by PR / Company for review purpose
where I've used the product in a make up look, or nail look I will add an * next to the product name in the post and this statement at the end of the post
*Provided By PR / Website / Manufacturer, etc.
When I've written a post that I've received some form of compensation for writing I will use this statement
This was a sponsored post on behalf of company name
Oh and stating the obvious if I don't add a statement it means I bought it myself :) I hope this clears things up for you the last thing I want is to come across as untrustworthy - I am by nature and honest person and I want my blog to be an extension of that. If you are a company and you are fine with this level of transparency please don't hesitate to contact me email@example.com