Sgstair has posted a bit of update on his current progress and an idea of what is to come with the next release.
"Hi, I’ve not forgotten about the ds wifi lib, I’ve just been busy with other things, and working on the features for the next version of the lib. Next preview release should have a number of small fixes and speedups, and will also have a complete TCP implementation as well as possibly DHCP."
It turns out 1.4C was actually older than 1.4A, and didn't include all the features, due to some mixup.
Caitsith2:
FWNitro 1.4D released. Here is whats new.
* DS card Dumping code moved to ARM9. (ARM 7 space needed for future use, like wifi for DS download play.)
* Alarm Clock user setting implemented.
* RTC settings implemented.
* Bottom screen where touch screen keyboard resides cleaned up.
* Info banner displayed above scroller (Line 1:Nickname, Current Date/Time, Line 2:User message)
* Source cleaned up a bit.
* New Installer code base (Now can be installed on unmodified DS lite/DS firmware v4-5/DS IQue.) (1.4A was silently updated with this installer code base later on.)
1. Improved homebrew nds loader
2. Proper detection of a valid menu nds file (should not detect most homebrew as a menu now)
3. Added support for XG 2005 flashcart
4. Much improved support for running games directly from MMC card (more games work well)