Sticky notes sw is skeuomorph pc crap par excellence; 3 M ("Post-it") should had have it banned world-wide in time; of course now it's too late.
Since it's (too) demanding to find ways to glue the stickies to divisions, pages, paragraphs, Excel cells and so on (cf. my discussion with Mr. Jaim over at outlinerblahblah.com), for most developers, in order to justify their prices (Jaim, TurboNote et al.), they spice their crap up instead with needless goodies the user (cf. the current thread's starting post) will then have difficulty to avoid, visually and/or by functionality, and most of the offerings do not even "follow" their original file when that's moved or renamed.
For the time being, users should have a look into metadata matters, mentioned again by me over at blahbah just some weeks ago: AHK both can read and write ADS, to give just one example, and SearchMyFile (another freeware from the incredible generous NirSoft venture) will find them. Thus, with just some lines of macro code, you would be able to get some quite satisfying metadata functionality on the file level at least, for free, and the way you prefer. OL mails being accessible, too, one by one, with some more lines of scripting, you'll be able to have stickies for mails, too, and with some more few lines, the stickies would pop up for any mail in question, or the mail would be displayed from your choosing from the sticies' list; all this is as basic as it gets.
Or then, continue to buy lovely-colored skeu-o-crap any lovely 3-year-old would rave of. Back around 1984, pc's were meant for grown-ups, you know, it happened only some time later anybody now's a comp expert. Well, such unwanted democratization at least holds prices down, as long as all those unqualified, retarded laymen more or less frenetically buy (this latter nexus not being evident in connection with cooked apple stuff yet).