Thanks for the solid options Brian!
My thoughts on the options you listed
MakerSpace wiki
I used to maintain the member profiles and projects on the wiki. it is ok. not hard, but very slow. Adding images is rough. I like that option as a lasting repository of a person’s work. I would had just a brief title and summary, with a link to elsewhere for the photos and detail.
Talk @dallas.ms
I think this is the my favorite option. It has that facebook/g+/instagram/pinterest immediacy.
adding a few photos is easy. you can link out for more detail and more pics.
Offsite page / site / blog
this is where you really want do provide all the detail and photos. you have the most control over the content, and can share with the rest of the world. it can be personal website, a service like dropbox or flickr or tumblr or google or … so many options. It can also be a shared learning site like Instructables.
If you choose this last option. please link back to us via Talk so we can check it out and say wonderful things about what you brought to life.