My Betta just got a new tank! It's one of the Hawkeye 5 gallons off walmart.com, and he's loving it! I site-to-stored it and it arrived in about a week instead of the 2 they estimated! Had to remove the filter, way too powerful and I was afraid of Betta getting stuck behind it. I'm gonna get some sponge and baffle it, but probably not for a while. So, hooray for frequent water changes!
I have a live plant that I'll be putting in there in a few days, Betta has a mild case of fin rot from tail-biting. I'm also gonna find a few more silks to go in, because it does look a little bare right now, but its better than a 1 gallon critter keeper with nothing! He had no trouble adjusting, and I now have him on a later daylight schedule so I can watch him while I do my homework (college).
Here's the first picture of it! Betta had just swam into his cup, and I had to snap a pic of him using it.