It won't do anything in normal games, no. But while it does give you the ability to use the Opera browser, it also gives you GBA compatibility and rumble support. If you're interested in any of that, then it's worth it. The 16 MB of RAM can also be used by DSLinux if you're at all interested in using that.
There are Phat-sized versions available. I know RealHotStuff has them, among other stores. I think BambooGaming and Winsunx do as well, though I haven't checked any others out.
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