Generally when we discuss the idea of platform agnosticism — that is, supporting a multitude of platforms, instead of just one — it usually pertains to mobile operating systems, mobile web vs. Java, or handset brands. But that narrow perception might soon become outmoded.

Orbitcast, a blog that follows the satellite radio industry, reported earlier this week that Chrysler talked up its plans to build mobile data services into its cars this week at the industry’s big annual auto show in Detroit. Orbitcast’s admonition for the satrad industry was that “they should instead be looking at how they can integrate into these systems and add value.” Wise words — and ones that extend to the mobile business as well.

Obviously there will need to be a mobile data pipe into the car, whether it’s 3G, WiMAX, or another technology. But moving past that, into content and services, there’s an opportunity for companies experienced in mobile as well. Here’s what Orbitcast says Chrysler’s talking about:

According to the company, the following features will be coming to Chrysler, Dodge and Jeep vehicles over the next few years:

* Turn-by-turn navigation combined with satellite imagery to provide more realistic maps
* Automatic wireless map updates, to ensure that drivers will always have the most up-to-date map information. Real-time weather and hazard information will also be available
* Electronic service reminders, delivered directly to the vehicle
* Internet search
* E-mail access, to include access to e-mail accounts, read-out of messages using text-to-text speech, and sending messages via voice command
* The ability to make on-line purchases, view streaming movies and download music
* Remote vehicle computer updating - Wirelessly download software updates for any electronic module
* Wireless audio and video file transfer from home computer to car

Who’s already delivering most of these services, or similar ones, to a mobile audience? It’s not Chrysler or other car makers; it’s not Pioneer and Kenwood and other car electronics companies. While yes, it does represent another platform (or multiple platforms) for content providers to support, this is an area where they’ve got a jump start on other companies, and would do well to take advantage of that lead.

So when you think about platform agnosticism, and how you’ll deliver your mobile service to different types of handsets, or if you’ll do a mobile web service or a Java app, it’s worth thinking about if and how you can deliver it to the growing number of non-handset mobile devices — whether they’re internet tablets, portable media players, or even cars. That’s not to say you need to be developing for these nascent platforms just yet, but they should be on your early-warning radar.