What kind of conversations on Facebook for an online store?

O.k., so I built an online store. I know I have to have a facebook presence.

I know facebook is not for selling. I do not want to spam my likers pages.

I sell little blue widgets. I can't talk about the general subject of widgets because I do not want to make my likers pursue other areas of widgets.

For example, I sell only yellow keychains, if I talk about keychains, I will lead them to other colors of keychains.

So what conversations should I have if I am limited to a small niche?

I want to have a casual type of relationship with my customers. A personable one. I don't want to have a typical corporate type atmoshphere on this site.

You know how some internet marketerss go for professional and then some will be super casual and even curse on their videos and writings. Well, I want that laid back style ( no cursing )

So here's my simple idea. I can just share the latest in google trends on my facebook. For example, today one term was the face transplant for the chimpanzee attack victim. I could come up with a few words on this. This way my wall postings will always be on the latest and most searched topics.

What do you guys think. I just think I will be boring people if i just discuss my product field.

Thanks for reading and look forward to your input.