*knock on wood* I have yet to need to jump start my 2008 so I think its safe to say that is a rare event and I wouldn't recommend going through the effort of rigging something up with that purpose in mind. Regarding the battery, my car is currently sitting at 11.5v (maybe a bit less now, haven't checked it in a few months) and still fires up like a champ. She's getting a new battery when the weather gets colder as 9 years from a battery is pretty reasonable in my opinion.
As for running something to connect more accessories, I actually did something similar as I have a number of things connected (PCV, autotune, heated clothing, battery tender, pretty sure other stuff I forgot about). I was troubleshooting an issue and ended up using a piece of battery wire (same as the negative to ground wire that is on the bike now) to connect to the negative terminal of the battery, extended it out of the battery box area and close to the throttle bodies where I connected everything up with a bolt, washers and a nut. It works nicely and I've left it that way (the frame ground appeared to be giving me issues but that's a whole other forum post).
As for parts, if you aren't going to worry about jump starting the bike, you can get away with thinner gauge wire which will be a LOT easier to run to where you want. There are various ways of connecting these wires to the battery but a simple ring terminal (looks like a circle that you put a bolt through and the other end crimps onto the wire) would be probably the simplest and are easily found at almost any automotive store. Don't forget to put an inline fuse as close to the battery as possible and I personally soldered that ring terminal onto the wire as well but I'm a bit paranoid that way.