A website I absolutely love writing for and being associated with is Gridskipper.
It is currently looking for regular contributors in:
Paris
Berlin
New York
Los Angeles
San Francisco
Sydney
So if you live in one of these places and can write, blog and take a picture, you qualify to apply.
If interested, send email to tips@gridskipper.com with not more than 5 lines on yourself and your city, plus a brief sample post (less than 200 words) about three favorite restaurants in your city. If you have any links to online writing samples or blogs, send them along too, without any attachments.
More information can be found here.
How much does online travel blogging typically pay per post?
That really depends on the website you are writing for, how often you write, how much you write, whether you send in a photo/(s), or a podcast, or a video-entry (vlog).
For instance, for a 200 word blog post you could get anything between $10-$20. Hope that helps!