How about “Geo-tweeting”? Automatically posting geo-tagged updates to Twitter via iPhone 3G‘s GPS chip, cell data coverage and wifi coverage? Maybe a Google Maps geotweet maps mashup?

Needless to say, I’m very excited about the new iPhone 3g, and can’t wait to get my hands on one and try out the GPS, high speed data, and new applications. Regarding iPhone 3G’s features – I’m dissapointed that there is still no native picture messaging, iChat AV integration or video capture. However, I’m hopeful that 3rd party software developers will be able to fill this gap – an all network IM client that could get on AIM, Yahoo, MSN, Jabber, GMAIL, IRC, Skype, Facebook and Myspace instant messenger networks (who sometimes share the same protocols…) would be fantastic.

Would it be possible to get super accurate gps reading via multiple gps readings? Use iPhone 3G’s internal GPS and Bluetooth connection to connect to a secondary, external GPS, maybe even one with WAAS land-based location accuracy augmentation? That, coupled with data network access could make for some nifty scientific, surveying, research and field applications…

Finally, the obvious application for a phone paired with gps paired with camera – automatic photo geotagging and upload. Flickr already supports geotagging and uploading via email (as well as third party apps). I’m almost certain this will be coming out of the gates soon after iPhone 3G launch, and almost certain I’ll be using it immediately!