I see a lot of bundles here I'd like to get my hands on
http://svn.textmate.org/trunk/Bundles/
The problem is I don't know how to install them. I've read the section 5 of manual dedicated to bundles, but there's no example how to install those from SVN.
I see the existing ones have the extension .tmbundle, but those on SVN are done differently.
Try installing the bundle "GetBundles". It will help you pick new bundles in a nice GUI. I've been using it myself and it's definitely better than manually installing bundles.
mkdir -p ~/Library/Application\ Support/TextMate/Bundles
cd !$
svn co http://svn.textmate.org/trunk/Review/Bundles/GetBundles.tmbundle/
osascript -e 'tell app "TextMate" to reload bundles'
Then, go to "Bundles" - "GetBundles" - "Get Bundles". (source)
Alternatively, you can just put your .tmbundles
into ~/Library/Application Support/TextMate/Bundles
, as you may have seen from the code above.