Acrobits Softphone works on 3G

Exploring a couple of new options for my carrierless life. Datajack + SIPDroid on the G1 is treating me well (minus a nagging echo for the other caller). I have been missing the iPhone some, so went scrounging and found acrobits softphone. I was excited to see that it allows calls over 3G (whereas Skype does not), and the call quality is great with good 3G. The downsides:

• still requires setting up a SIP number
• you have to jailbreak your phone to get the datajack sim card to work
• the app has to stay open to receive calls (jailbreaking may solve this one)

I think it would be a great alternative to iPhone users who don’t mind getting their hands dirty. Certainly beats Skype’s limitations, and doesn’t require an Android phone.