Christmas for running wife

Extra pair of her favorite run shoes

Massage

Favorite run shorts/ sports bras

Race entries

How much do you want to spend?
Also if she is already training/running she probably has all the essentials, but...

Less expensive:
Compression sleeves/socks/pants
Foam roller/The Stick
Sunglasses
Fuel/race belt
Socks
Hat/visor
Hand held water bottle
 
More expensive:
Garmin/GPS/HRM
Sunglasses (Oakley or fancy brand)
iPod
 

Gear for night running:

Super deluxe flashing vest

Comfortable and bright light

Maybe one nicer item and then a gift card for the local running store to pick out what else she wants. 

I'd go with a gift certificate.. All of my athletic stuff is very very personal. Including the use of a gps watch. I'd love a 200 dollar gift certificate to Amazon designated for running stuff.

Whatever I need.. whatever I want.

Wrapped up in a nice bow in a box with some fantastic socks that I like.

No one can ever have enough great sox and I am always feeling guilty for buying expensive ones. 

Are they into the minimalist running yet?

I always love some Vibrams.

yes! SO pricey but SO nice! My husband got me a gift card and I picked out a beautiful pull over! I wear the S out of it and it's held up nicely.

and I LOVE the massage idea !!

You will be assimilated.

Same thing here with my wife. She's the "runner" in our family and she does not have a quality GPS type watch. She has never wanted one until she started borrowing my garmin for her long training runs (training for Disney M in January). So, I think I'm going to get her a new GPS/HRM watch of some type- not a big blocky one like my garmin, but a smaller version. Maybe a fuel belt in girl colors etc.  We live in FLA too and 80% of time run in shorts/minimal warm weather gear.

A couple of other ideas for you to consider:

What about a running top/shirt with custom printing....you know, her name on the back, and a message or something.  If she has a charity then put that on there - some up with a logo/quote.  Something that she can wear during the event!

If it was me, I would take this one step further and by yourself a 'team mrs isyphoto' supporters t-shirt (with printing on the back/front that says 'Mrs Isyphoto Support crew) - you could do this for everyone thats going to be at the event supporting her (your kids? other friends etc) - this way it will seem like she has a whole branded support crew with matching shirts etc. I've seen people do this at various events and it looks so awesome!

I would take this one step further again, and wrap all the shirts as xmas presents (even the one for yourself) an put them all under the tree.

Another idea for you to consider:

When I ran the Sydney HM this year, my wife booked us into one of the best hotels in Sydney (which was only around 1km from finishing line).  This was awesome because she picked a hotel that has amazing indooor pool/spa/sauna facilities.  So even though we live only 1 hours drive away, I got the chance to go back to the hotel after the event and have a swim, sit in the sauna, relax for an hour etc.  We then got dressed and went for lunch to celebrate.  This was a great way of making the event an  experience, as I am sure if we had driven straight home after the event, we would have just got into the routine of washing, housework,groceries etc (all the usual stuff you do on a weekend)

One more thing:

Some books on running/training - I read a lot of sports related books and they are great to keep you motivated in training.

That sounds like a winner.. but I always have to try stuff on.

Not to hijack, but I buy most of my running clothes from Kohls on clearance. They have some fantastic looking athletic wear and they change the styles often. I always go look on the racks for that stuff.

I'd prolly kill my husband if he bought me a pair of those ugly things...