granted this wouldnt fix the ability of other people to send us picture messaging, as they would have to use our full phone email address as well, but this may atleast provide some sort of sanity for iphone att users atleast being able to send messages, and might be a neat feature to have for just about every other basic reason - making it easy to send a picture to a contact email address instead of to their phone (so they can for instance have it already injected into their computer and downloaded by simply checking their mail)... so it'd be like killing 2 birds with 1 stone

an extension of this idea would be... having some sort of non-MMS related version (that would help avoid picture message fees) to be able to specify a contact, and then instead of having to rely on the full phone email address having alreadying been attached to that contact, make it so that theres like a drop down that lets you select what carrier, which then takes the phone number from the contact, and appends the would be full email address to the end of the recipient.. such as... my friend Abc's number is 1234567890 - so from swirly, i select my buddy Abc and then choose his carrier (verizon for instance) and then it takes his number 1234567890 and then slaps @vzwpix.com onto the end of it... ultimately for repeat picture messages to the same person, best case scenario would be being able to specify at the contact level what carrier they were, so it was more a swirly extension onto contacts, which might not even be possible.
but yeah, yada yada, would be neat, might never happen... but from the basic notion described originally, it may make sense as a very valuable addition on multiple levels for a future swirlymms release.