Update: Paul B mentioned the "Merge to HDR" in Photoshop. For some odd reason, I'd forgotten about that capability. Maybe because I did not think it would work with hand-held images (Helicon for depth-of-field can't handle them). It was not a very intuitive function, but after reading MR's introduction, I managed a first result (see below) which is good, in fact much faster and better than what I had done by hand. This is with the "equalize histogram" setting. Oddly, both this option and the otherwise promising "local adaption" option gives me much paler images than what the preview shows while adjusting the filter, rather impractical.
Also mentioned is Photomatix Pro, specialized software for this purpose, I am trying it. It seems though, like Gary hinted, that this software is not very good at combining hand-held images, which makes it at bit pricey at $99, when Photoshop can do a pretty good job alone at HDR, and better at merging (so you don't have ghost details).
The underexposed in the bracketing set:
And the Photoshop-combined picture:
The Panasonic G1 (and GF1) has 2/3 stop as the maximum difference in exposure between bracketed shots, which I think is too little.
-------------------------The BW Portrait contest is still open. If you don't have a handy model, use yourself, a few entrants have already done so with good results.