Palm SDK path to binaries must be added to your system environment PATH. If not, add it to your ~/.profile:
# Add PalmSDK bin path to PATH variable
export PATH=/opt/PalmSDK/0.1/bin:$PATH
To install via Git:
mkdir -p ~/Library/Application\ Support/TextMate/Bundles
cd ~/Library/Application\ Support/TextMate/Bundles
git clone git://github.com/devilx/palm-webos-development-tmbundle.git "Palm webOS.tmbundle"
osascript -e 'tell app "TextMate" to reload bundles'
To install without Git:
mkdir -p ~/Library/Application\ Support/TextMate/Bundles
cd ~/Library/Application\ Support/TextMate/Bundles
wget http://github.com/devilx/palm-webos-development-tmbundle/tarball/master
tar zxf devilx-palm-webos-development-tmbundle*.tar.gz
rm devilx-palm-webos-development-tmbundle*.tar.gz
mv devilx-palm-webos-development-tmbundle* "Palm webOS.tmbundle"
osascript -e 'tell app "TextMate" to reload bundles'
Source can be viewed or forked via GitHub: http://github.com/devilx/palm-webos-development-tmbundle/tree/master