If you are into time-killing Flash games/apps/videos/whatever, then perhaps you’d want a better way for organizing them than simply bookmarking them in MicroB. That’s when something like FlashLauncher comes in handy.
Besides being a pretty good organizer and a database, FlashLauncher helps a bit more when it comes to running Flash stuff. Mainly, anything you add in is very configurable, you can chose between engines to run the app, force the quality (everyone who has been trying Flash on MicroB knows how much pain it is to change the quality sometimes), and you can add your own instructions, picture and other pieces of information in.
Launching Flash in Webkit has quite some advantages, such as having the unwanted screen elements of MicroB removed, and with FlashLauncher you can also launch apps that are not just simple swfs, I was able to launch some stuff from Kongregate, for example. And, yes, there’s now some proper portrait mode support.
So, why bother with MicroB bookmarks when you can fetch FlashLauncher from Extras-Devel and have better Flash experience on the N900?