The Nintendo DS line has had many redesigns up to the present 3DS, but one thing that hasn't changed are the tiny, easily lost cartridges. Enter Memorex's $20 Universal Game Selector Case, announced as part of its gaming accessory lineup for E3. The UGSC stores up to three games and hooks up to the cartridge port on any DS, letting you swap between them using a signal routing switch. We've seen cases similar to this in the past, but Memorex's take is the first to support 3DS titles as well. Based on the renders, the unit looks to make for a weird fit and some noticeable extra thickness (10.5mm to be exact), especially on the DSi XL, but hopefully we'll get a better idea of how it feels in hand at E3. From a functionality perspective, the case does seem rather useful for those with forgetful tendencies, if a bit underwhelming for anybody else. Memorex will also be displaying its new third-party PS3 and Wii motion controllers at the E3, which are viewable in the ...