We have mentioned Steve Caplin several times recently, and I have just discovered that he has a new revamped website.
It is a nice clean site, but what I really like is the Photomontage page, that has a collection of the work he has done for newspapers and magazines.
http://stevecaplin.com/photomontage/
The pictures are viewable at a decent size, and I found some of them both informative and inspirational. A lot of them are more illustrative than photorealistic, but you can reverse engineer and work out a trick or two by looking at them. I particularly liked the 'If Top Gear was Presented by Women' illustration, that works on so many levels. Especially James May as a frumpy matron. I think Richard Hammond's neck is tads too long though.