Just to clarify things (Michael correct me if i'm wrong) this is the work required to get a software virtual keyboard running on N900:

• Adapt gtk im context from meegotouch-im to upstream maliit
• merge mikhas hack of current meegotouch-im packages into maliit
• Add keyboard variant support

And this is what we have right now:

• Upstream maliit properly packet with full support for N900
• QML based keyboard up and running with full support for QtComponents apps

by far, the fastest approach is to contributte to maliit. Those guys are very receptive. There are a lot off efforts but IMO the correct approach is to work on it