b. Choose the best and most representative photo; put it on Facebook in a single album, dress it up, make it exciting, whatever. In the description, add the Picasa link.
Have you thought about sharing them via flickr?
Hmm, flickr is compelling. At least they seem to have some sort of facebook integration. Downside: I will have to get a premium account since their free accounts limits are so 2004. Taking one picture and just linking to the gallery in its description is a good alternative, albeit a little bodgy.
Must mull this over for a while. Thanks for the tips.