I have seen these threads for BBs and Palm Treos, I am wanting to see what other people are seeing as must-have software. I'll start:

- BTAudio - streams ALL audio to any BT headset you have.

- If you are using Wireless Stereo, get the T-Mobile updated ROM. This update changes the network connections console, enables Wireless Stereo headphone capability, and changes the EDGE/GPRS indicators (E = Edge, G = GPRS). This update also makes other changes.

- Got XM Radio? Go to XStream with your MDA. I use this daily at my office (satelite link is not capable at my cube). Best way to use this option:

1) Set your MDA to Modem Link (USB). Activate that Modem Link. Do this to avoid using the corporate network for streaming media (If not, activestink will use your PC internet instead).
2) Hook up your USB cable to a computer. This will keep solid charge to the phone and allow you to listen to XM radio without eating up your batter.
3) Login to Xstream and enjoy.

I am looking for some other nice additions to my MDA addiction, please post. The ones I have seen that get of any decent size are usually stickied.

One more thing:

Need to stream your Exchange data to your PPC? IT dept got your Exchange ActiveSync disabled? Use Emoze. http://www.emoze.com

For me the most "must have" piece of software is Kasweui Hitchhiker.

It is freeware, and searches/connects to any available wireless network without haveing to do it manually.

look here http://www.kasuei.com/hitchhiker/ for more information.