B&H Photo Video has a couple Black Friday deals on Samsung microSD cards. They come with SD adapters so you can use them as you normally would SD cards.
These cards are a decent speed — they are rated U3 for a minimum 30 MB/s write. In fact, they are the most affordable U3 rated cards available — priced 20-25% less than the SanDisk “Extreme” comparables. The micro form-factor allows you to use these cards in other devices as well.
Best Buy also has the same or similar prices on Samsung micro SD cards.