What kind of riding does wifey do? If she pounds the pow I would think a set of Better Boards would be a good add. If her hands get cold easily then maybe the RSI hi temp grip heaters with a soft ODI or similar grip over top. Maybe an under seat bag or the Skinz tunnel bag for all her stuff.
How does your 08 start? Mine was 2 or 3 long pulls before I calibrated the TPS. Starts way nicer now. Many shops have take off elctric start kits on the shelf too. I would think you could rack up some real brownie points for that.
Maybe a Muff Pot for a warm lunch on a cold day. For my wife it was all about good riding gear to keep her warm and dry. Proper helmet/goggle fitment is important too.
As for that particular model I would do the following for preventive purposes:
Make new grounding wires from the ECU mounting plate to the chassis and to the motor. Use a marine quality 8 ga tinned wire with heat shrink epoxy connectors. Search my name (EricW) in the advanced searches and you'll find where i have posted this with good pics. this may well save you the dreaded ECU, Reg, Etc, fry downs.
I would also replace the left front motor mount bolt with a better grade ARP bolt. You find that with pics in my past posts as well.
Keep an eye on the chain case cover and see if possibly your dealer will hook you up with the OEM fix or just get an Avid billet replacement. Remember too that the chaincase drain plug strips easily.
If in deep pow, it's a good idea to separate the intake plenum and re-silicone it to keep water out of the air box.
Beyond that, get the bars and headlight set up for her and let her go. Hope she enjoys it. EW