Hi, I don't know how relevant this may still be considering that this is an older thread. I myself play lap style and noticed the references in here about capos so thought it may be useful to share a link that was a big help to me.
http://www.sternercapo.se/Capomuseum/Special/Dobro/resophonic.htmThe page is all about resophonic/dobro capos in particular but the same capos can also be used for any guitar setup to play lap style. From the information on this page I was able to make a couple of capos for when I play lap style. Before I discovered this page I was unaware that there was such a thing as a capo that clamped a bar to the strings without also being clamped to the fretboard, so I thought perhaps there might be another lap style player out there who could also hopefully benefit from this Aladdin's Cave of capos.
Also, speaking of Aladdin's Cave, this page is only part of a larger site called The Sterner Capo Museum which is as good as it potentially sounds.
http://www.sternercapo.se/Capomuseum/index.htm#menu
