You can set the time inbetween each jump in game days. Setting it to 0 will disable jumping completely.
The game will check for signs in the intro game and (if the setting is not disabled) jump to one after another, alphabetically. So to use this, just make a nice savegame with some signs at the places you want to show, labelled '01' through 'xx', rename it to opntitle.dat and place it in the data folder. Then set the patch setting to an appropriate value and restart the game.
Two small changes I've made with this patch:
- signs are not shown anymore in the game menu, for not spoiling the pleasure with "1", "2", ... signs in the view.
- when moving the viewport a bit so that only a part would have to be redrawn, if we are in the game menu redraw the whole screen anyways, because the "OPEN TTD" letters would cause graphical glitches else.
I'm providing a little opntitle.dat I've made myself, however it's not that great. I hope to find someone who is willing to make a contest for a new title game, similar to the contest littlemikey held some time ago - only this time with this new feature.
I also hope to get some feedback from devs - are there any issues with this patch? What do you think of a new intro game using this feature? Any chance for trunk now that 0.6.0 is out? (feature lock bye bye

So, enough talk, see for yourself

edit: something i forgot to add (sorry wolf01)
this patch is based on wolf01's patch. I added the functionality with the signs and managed to fix the problem with the OPENTTD letters, but initial coding and idea is from him.

edit: rediff for r12628
edit: rediff for r12733
edit: rediff for r12805