Ktxt2tags Service Menu
More good news for you, KDE people!
David Area, a long time txt2tags user has made a Konqueror Service Menu to integrate ktxt2tags in the contextual menus of Konqueror.
Now you can right-click any .t2t file in your disk and choose the "Process with Ktxt2tags" menu item to open the file in ktxt2tags. Pretty handy!