There are all ready quite a few good OOMMF resources on the internet. I’ve linked to some of them here.

Be sure to check out my OOMMF Tutorial.

Official OOMMF Resources

http://www.ctcms.nist.gov/~rdm/email-list.html
The oommf mailing list. Great for just finding out what other people are up to. You can also submit a problem or solution of your own.

http://math.nist.gov/oommf/
The main oommf website.

http://math.nist.gov/oommf/otherlinks.html
List of other suggested ooomf links.

Other sites

http://www.southampton.ac.uk/~fangohr/software/index.html
Southampton has contributed a number of different tools and modules to
oommf.

http://glidingphenomena.blogspot.co.uk/2011/04/mac-installing-oommf-on-mac-os-x-snow.html
A guide to installing OOMMF on a mac. Not something I’ve tried myself, but included here incase it is of use to someone.

http://www.ctcms.nist.gov/~rdm/mumag.org.html
Micromagnetic modelling activity group

http://thebrickinthesky.wordpress.com/2013/08/03/oommf/;http://thebrickinthesky.wordpress.com/2013/11/06/oommf-2/ – Two blog posts about installing and using OOMMF.

Papers, slides etc

There are many papers which use oommf. Here are a few resources which
explain how it works:
Discussion of oommf paralellisation
http://math.nist.gov/~MDonahue/talks/mmm2008-mmpanel.pdf
http://math.nist.gov/~MDonahue/pubs/parallel-oommf-20090518.pdf
http://math.nist.gov/~MDonahue/talks/imag2009-paraoommf.pdf
http://www.ehu.es/sgi/uncategorized-en/oommf-3?lang=en

OOMMF parallelisation summary:

To enable parallelisation with boxsi, use -threads x where x is the number of cores/threads you want to use.

Theses

Theses are a really good place to get background info. Here are a few
I’ve found:
Richard Boardman – http://www.southampton.ac.uk/~rpb/thesis.pdf,
http://www.southampton.ac.uk/~rpb/thesis/node1.html
– http://www.physics.mcgill.ca/~peter/theses/collins.pdf
XIAOLIN HU – https://ida.mtholyoke.edu/xmlui/bitstream/handle/10166/975/th_x.pdf?sequence=1