I currently have a DroidX and a DI in my possession. The DLNA is really cool when I can watch videos or listen to music that's on my phone wirelessly with my PS3 on my TV. Unfortunately I doubt it will be able to be ported over anytime soon...if at all.
What's I'd really like (the thing that would get me to choose DI over X) would be to get that sweet new Media Dock app from the DroidX working on the DI. I was able to pull it and "install" it on the DI using Astro, but it does not give me an icon to launch it on command. If I go into Manage Applications and tell it to Launch then it throws an error about an "activity" that's missing.
Anybody still working on this? I'm no Dev, but I am very familiar with ADB and very willing to try any suggestions you Devs may have.