Update. I got my solution yesterday. I have been focusing on it rather than my fin, sorry

Anyways, it's good to know you have options for your DS, maybe even moreso than for your DSi. Unfortunately, the only available (feasible) GBA slot solution that fits right in my DSL is the EZFlash. They recently changed their production process that breaks the factory perfect NDS Browser rom. I had to googlearn how to patch it properly, which took about 3 hours. The final process took about 5 clicks and a rename - wasteRtime!
The bad news is most open source projects are not ported to the DS. No firefox. No office suite. But wait, what's with all these music sequencers and drawing programs?! Let's just say that a real shell needs to be made so the DS can be an alternative to bigger computers, just like the finesse should be. I want to have to think hard between taking my fin or my ds places. Not functionality, but hardware and hardware alone. For instance I would probably take my DS for ebooks, but for mostly calls the fin obviously. It's just the hardware. I want both to be able to essentially run very similarly. Heck, while I had service turned on and when it gets turned back on, my wife will continue to use DS styli for the fin. And the DS has voip apps. Funny eh?