Looking for creative writers on adhoc basis (ongoing work)

Words per article: 750+
Information for the blog/website: Various
Topic: Various
Tone: Other
Outline & Structure: The type of content you will write could be varied, we'd typically only pass a job your way that you felt comfortable writing and that you wanted. Mostly, the content that you will be writing will be blog posts. Please see below for more details.
Extra notes: We're looking for writers to use on an adhoc basis and to work in our project management system and to work with our outreach team to write content for the web on a variety of subjects, mostly for blogs but could be for website info pages, website sales pages, product descriptions, brochures, advertising material etc etc so different writing tones may be required.

This is remote work and likely ongoing if you can write creatively. You will be expected to write in your own name, using your own author credentials and promote via your own channels (as you would any of your own work).

We're looking to work with numerous freelance writers so we'll be in touch with multiple applicants.

Whether you wish to supply a fixed rate per article/blog post or an hourly rate is up to you...

Please supply a sample of your writing work and/or a link to a portfolio of your own work.

Thanks in advance.

*** UPDATE 20/02/2015 ***

We're receiving some fantastic proposals (thank you all) and we are looking for more than one freelancer for this work so because the PPH system only allows you to accept one proposal, we shall be posting duplicate jobs and inviting the freelancers that we're accepting individually.