IPv6 is of no concern if the workarounds are e.g. 1) "I'm sorry, I cannot read your MMS, can you send it by e-mail?" 2) Switching SIM to e.g. S60 device with MMS support.

For a quick, dirty hack IPv6 is of no concern because no Nokia N900/Maemo 5 user uses native IPv6, and even if there are such users they're minuscule minority.

BTW, i also don't understand why you'd want to use IPT for this. All you need to do is route all traffic to the MMSC over PPP1. So if the user defined mmsc.mms.vodafone.nl as MMSC then you'd use # route add -host mmsc.mms.vodafone.nl dev ppp1 after you bring up PPP1, which can be done via some scripting. Then when application tries to talk with MMSC it will take the correct route; no IPT is necessary. Thanks for thinking with us though

Because this is a returning trend I added 'MMS / rough roadmap' in the wiki. This shows the possible roadmaps this project can follow. This is important because every possible solution to the problem has its +/- and follows one of the outlined roadmaps, but if someone replies tothe proposed solution with a different roadmap in mind this blurs the discussion!! Feel free to contribute.