Geotagging photos using Linux

I’m about to embark on Geotagging my photos with Linux. Basically, this will amount to:

1. Figuring out the right way to add Lat/Long information as EXIF data to my photos.
2. Figuring out the right gallery2 plugin to parse, import, and display this info in a reasonable way. Optionally, generate Google Earth .KML files for albums, display inline maps, display an overview map, etc.
3. Figuring out how to associate a .GPX log file (from a handheld GPS) and associate it with a large set of images, to automatically add EXIF data. (I believe that gps2photo, below, will do this).
4. Automating everything in a reasonable way such that its not too much work when I upload photos.

To that end, here’s a list of some useful starting points for software. I don’t think that there’s any software out there that does all of this, but I’m still looking.

http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/GPS.html

http://www.sno.phy.queensu.ca/~phil/exiftool/

http://www.carto.net/projects/photoTools/gpsPhoto/

http://sourceforge.net/projects/gps2photo/

http://codex.gallery2.org/index.php/Gallery2:Modules:Map

http://www.ozhiker.com/electronics/pjmt/

http://www.jakeo.com/software/exif/index.php

http://pel.sourceforge.net/

http://tadek.pietraszek.org/blog/category/programstools/