I am really missing KeePassX,
And a better PDF reader would be nice (remember where you are in each file, better search, table of contents, etc...)
I use the n900 as a netbook replacement, so I sync all of my relevant files in a folder with Drop900/DropBox, I use the Freoffice for the word/excels I use for work, and PDF reader for the pdfs from university, I use Git for syncing some of my devel projects, and more, the only thing I am missing is getting KeePassX to wok decently so I can use it to manage my passwords...