One of PersonalBrains weaker area's is exporting multiple notes and attachments. It's not that your data is held hostage, it's very easy to get your notes and attachments out of PB for each thought, but the export formats are primarily for outlines, web sites, and importing into other brains.
So I take it with the limitations that the Brain has, it's still good enough for you to make it worthwhile your time and effort to build brains? Quote:
Honestly, I think it's as good as you make it, and can find uses for. My advice is to devote 2-3 weeks to continual use. If you use it at work, make a thought for your common tasks and link the documents, task locations, websites, etc to that task.
If you have an upcoming project, link the people and phone numbers, along with steps, documents, etc.
If you use at home, import your bookmarks and link like websites together (like forums, financial sites etc). Create a to-do section and list everything you have to-do, as well as sites to related information, attachments etc.
While you are testing the software, don't add file attachments internally, just add them as links, so you have nothing to lose if you decide it won't work for you.
I know this doesn't answer the question exactly, but it's the best advice I can give if you are considering using the software. Well, that and check out these forums for tips, uses and other good info.
Java SE 6