Breakout Board for 1.27 mm to 2.54 mm
This kind of breakout board is often called breadboard adapter.   Here's an example.



more details on manufacturer's web site: http://www.beldynsys.com/singledual.htm

more manufacturers: 
http://www.schmartboard.com/index.asp?page=products_so 
http://www.capitaladvanced.com/9000ser.htm

edit

Old thread on a similar subject.