A geotagging update:
After a number of false starts, fruitless efforts, software installation, software removal, uploading, re-uploading, etc., I finally worked out the geotagging magic.
I've got two galleries of shots from my Berlin trip, pretty much all geotagged and mapped, on Flickr and on Picasa. I used a GisTeq PhotoTrackr, with the (horrible, confusing, designed by aliens) GisTeq software used to (finally) associate the correct time/location with the correct photo. That took several tries.
Next, it turns out that there's not one, but two checkboxes you have to click on to get location data uploaded to Flickr. First, you have to share EXIF information. Then, you have to save any location data provided. Flickr is another example (at least in configuration) of non-intuitive design...
In between the inability to get Flickr working, I pulled down IrfanView (to verify that the location data was getting correctly stuffed into the EXIF), and the latest version of Picasa (which allowed me to verify that, if I had location data, it was possible to upload it someplace and take a look at it...)
Anyway, it works. I'm going to have to look for alternatives to the GisTeq software, at least for anything other than pulling the tracking data off the device (which is likewise horrific); anyone know of any projects working on this, e.g. associating NMEA datalogs with photographs, especially graphically...?