Even though dividends are out of the order, still an interesting question.

I was first thinking about keeping them on myetherwallet, same address as my Ether tokens. On second thought, probably a bit safer to store them on a separate ether address, right? In case one get's hacked, or if I make a mistake I won't lose all my (different) tokens.

However, now I'm leaning towards storing them on the Iconomi platform. The 2FA provides extra safety imo, and if their platform get's hacked or if the company disappears the token would be worthless anyway... So not much to lose by storing them on there...