Can anyone recommend some guided anapanasati resources on the Web? I'm trying to take my practice back to the beginning in the hopes of energizing it and I think this might be helpful.I currently don't have access to a teacher so some Web resources would be great particularly some guided mediations that I could follow.
The best is to go to directly to the Sutta or what the Buddha directly had to say about it. There are 2 good translations by Piya Tan:


Anapanasati Sutta
Anapanasati Sutta, Trilinear edition


A more detail explanation of the Sutta is available in Mindfulness with Breathing: a Manual for Serious Beginners, 2nd edition which does a wonderful detailed explanations. (Don't use the 1st as this is a poor translation.) In addition there are some lectures by Budddhadasa Bikkhu: Anapanasati by Ven. Buddhadasa.

For the very basics have a look at: Mini Aanapana.

Also 


Anapana Sati Sutta by Bhante Vimalasiri
Anapana Sati Sutta by Ven. Bikku Bodhi


would be helpful guides.

Also you can try to locate a more formal retreat like through: http://www.dhamma.org/en/index or http://www.buddhanet.info/wbd/ which will solve the issue that you do not have a teacher.