As the full story of recurrent installation attempts is kind of "literatur-ish" I won't post it here. But for those who wouldn't mind reading on, here is the link to Alfresco mobile on iphone 3g.
Interesting. But that was never going to work due to the armv7 minimum instruction set we compile for (as do Apple for iOS 5).
Alfresco Mobile works well on a 3GS and will continue to do so until Apple makes it impossible or impractical to support – we relied on some iOS 5 only features for 1.3 which would have taken us weeks to implement ourselves.