Go see her. Be prepared to do most of the talking as she will probably not be up to it. Just every day stuff. Tell her about the kids, everyday life, things going on with anyone that you still work with that she may know (nothing real gossipy though, just things like so-and-so had a baby, ot so-and-so is engaged/married.) Talk about the same things you would talk about over lunch.
She knows she is dying, so there is no need to act like she is not. I'm not saying bring it us or anything, but you don't need to feel awkward about trying to see her "one last time". It will mean alot to her.
When a friend of my dad's way dying he did just that. Went to see him (he lived several hours away) and just filled him in on the kids (my brother and myself), his job, how fishing had been that summer.... IT was hard for my dad, but I know it meant alot to his friend and my dad treasures those last memories.
**HUGS**