Hello, I am very glad I found this place! I have 3 bettas right now, and am wanting to get another---yep, the addiction has set in.......
My newest little guy is Toby: I bought him (from WalMart) because he looked just gray and boring, more like a little trout than a betta. But when I put him in his 10 gallon tank that also houses 6 African dwarf frogs, he started turning blue! Here are a couple of photos; in the first pic that's a bubble nest at the top, isn't it? He sure does blow a lot of bubbles up there. That glob to the left is a cube of brine shrimp he's occasionally munching on.

And here he is with a few of his frog roommates---they get along great! He follows them and stares at him a lot, and they just ignore him and do their thing, heheh.