I have the latest, 1.0.2 released May 28. Looks like we may have a functionality that is currently built into the app but is not supported by the site (which is fine) -- except that does not explain why you two are NOT seeing the "insert photo/video" function.
Just to be sure, you:
1. Open a thread
2. Click the "+" button in the upper right to make a new post, opening up the two white boxes that say "add title" and "add content"
3. In the "add content" box, you do *not* see the round "+" sign in the upper right? (clicking on this brings up the "insert" function)
Correct?
Also, are you using iPhone 4 with IOS 4.3.3 or an earlier version?