SunOL doesn't download games, it's just a list of games. Besides which, the current wifi library makes downloading entire games directly to the DS pretty much a huge waste of time; speeds max out at about 15KB/s, which means at least a ten minute wait for even the smallest of ROMs. The wifi driver in DS Linux is a lot better (I've gotten upwards of 100KB/s), but there's no piracy app for DSLinux and I highly doubt there's ever going to be one. If you could find a site with direct links to ROMs (that is, one that doesn't require you to fill in a captcha or anything, unless you want to use the graphical version of Links, and that's a whole nother story), you could use Links under DSLinux to download ROMs at a halfway respectable speed, but if you're going to that much effort, you might as well just plug your microSD into your computer and do it.