useful links….

 - Motorcycling and Overland travelling information, advice, routes etc:

          http://www.horizonsunlimited.com/

          http://www.advrider.com/forums/index.php

 - Free Garmin maps:

          http://garmin.openstreetmap.nl/

 - Temporary motorcycle insurance: 

          http://www.MotorcycleExpress.com/

          http://www.bajabound.com/

  - Motorcycle shipping: 

i would highly recommend these guys, Giles helped sort everything out for me from the UK to Argentina. 99% of other British riders I have met would also recommend them!

          http://www.jamescargo.com/motorcycle_transportation/

From Panama - Columbia (or vice versa)

     by air:

          http://www.girag.com/

     by sea:

There are a few options by sea, i have heard good things about the below (more expensive than some other sailing options):

          http://www.sailawaypanama.com/motorcycle.htm

 - Parts, spares & repairs:

          http://www.metalmule.com/

          http://www.bikebandit.com/

          http://www.overland-solutions.com

          http://www.touratech.co.uk/

          http://www.adventure-spec.com/

          http://www.nippynormans.com/

          http://www.advdesigns.net/

     Auxiliary fuel:

          http://www.rotopax.com/

- Accommodation:

A small selection of websites I used.

Accommodation was also found through the links and the other peoples posts and reviews on Horizons Unlimited & ADV rider, but a majority was found through asking the local people and other travellers, these places rarely have websites 

          http://www.hostelworld.com/

          http://www.tripadvisor.com/

          http://www.campingo.com/campsite.html

          http://www.travellerspoint.com/

          http://www.hihostels.com/

          http://www.lonelyplanet.com/