HUD being obscured by interface...

I am creating some hud objects I want to let people attach. The problem is, when I attach them, they are sort of underneath the top and bottom menu bars (some of the object shows, some is obscured). Is there something I need to do to tell it to not end up under the interface bars?

Edit it like you would a normal in-world object, and pull it up all the way onto your screen. Since you can see part of the object, you can actually zoom (while you're editing it) on the HUD attachments using ALT-drag to better see what you're doing.

Does that positioning stay when the next owner gets it and attaches it to their hud? Or will they have to move it as well?

It stays, but there's some question of what happens on screens with different resolutions/aspect ratios. I think it is the vertical that is preserved though, so you may only have to worry about the attachment going offscreen to the left/right. I think maybe you could run in windowed mode and resize your window to test it.

be aware that the windowed version of sl is a hair smaller than the same resolution at full screen. you could temporarily change your screen resolution 1024x768 should be fine or any 4:3 aspect ratio I think, retest at 800x600 to be sure) for initial placement... that should guarantee it'll at least be on screen for widescreen aspect ratios. users with other ratios should then be able to move it where they want. or you could use the default center, so even if they place it in another location it'll still be editable.