www.winsunx.com has the new EZ4 Deluxe and Compact up for buying.
It has alot of potential, and GBA support is the best out there I believe. DS support still needs a bit of working though. Most of the important homebrews like BeUp and Moonshell work, and DSorganize works if you use an older version I believe. (I didn't really get to try it because I don't use it.)
It's not as flush as the Supercard Lite / dust cover, but it's really easy to take out and the MicroSD slot has been worked a bit on, it's much easier to take out now.
So yeah, basically...
DS is most important, GBA not really, homebrews yes sir = Supercard Lite
You want DS and GBA, with a less amount of homebrews and skinnable menu = EZ4Lite.
My full review will be up tomorrow.