YOU FOUND IT
here. The second link of a Google search for the name of the cab would have shown you that. Gotta love Google, it even suggested the right thing as I started typing the cab's name. A couple of the custom roms even have this already built in.
Pocketnow also did a write up about this app when it came out last year, which can be found
here.
Judging by the file size of the .cab you posted, you posted an out of date cab. The latest version is v.948, which can be found
here which is alos the official home of the project. That is a Russian site, so here is the Google
translated version. Although hc4 is the author of the app, hc4 wasn't the op of the
xda thread, so updated versions are scattered throughout the xda thread. I'd still read through it though if you want to find out more about it as hc4 does answer a lot of questions.
Although Obex Inbox is a nice little companion app, I don't really want this thread to get off topic from Persian Blue. However, if there is enough interest in it as well, I'll add it to the op or give it its own thread.