Textmate Hyperlink Helper Menu
The Hyperlink Helper menu is another fun bundle that I had never noticed in TextMate.
Ctrl + Shift + L - Wraps the selection in an anchor tag with a default href attribute, pretty simple.
The real interesting stuff is the Google and Yahoo web lookups:
Ctrl + Shift + Apple + L - Performs a Google search for the selection and links to the first result found
Even better:
Ctrl + Shift + Y - Pops up a menu with 4 different Yahoo search options. Then performs your selected search and pops up a menu with the option to link to any of the top 10 search results.