I found this real helpful link regarding the menu mapping changes that have occurred from Notes 6/7 to Notes 8. This will help you in navigating around Notes 8. If you are used to navigating a certain way in Notes 6/7, how you navigate to certain features have changed slightly. Hope this helps.
Lotus Notes 8 Sidebar Apps
Looking for some Sidebar applications to spice up your Lotus Notes 8 client? Mikkel Heisterberg — author of the TwitNotes plugin to let you use Twitter directly from Notes 8 — has links to some good free Sidebar apps you might want to try:
Customer of mine is currently going through a migration of their Notes environment to Notes 8.0.1. Of course, as any good customer would do, they want to re-evaluate their infrastructure and consulted with their favorite vendor, IBM. One of the questions that came up was, would it behoove them if they switched from a 32-bit environment to a 64-bit environment in order to maximize performance and efficiency?
So here’s the skinny and thanks to my teammate Matt Engstrom and IBM’s Techline organization. Windows itself can’t use anything more than 4 GB of RAM per instance unless you’re running 64-bit Windows. If your organization is running 64-bit Windows, then you can also run 64-bit Domino, and take advantage of configurations that have more than 4 GB of RAM.
64-bit Domino is 100% compatible with both 32-bit Domino (so that you can run mixed server environments) and the Notes client. The only thing to be aware of is that upgrading a 32-bit Domino server to 64-bits will take a little bit longer (maybe a couple of hours) because database indices need to be rebuilt with the 64-bit indexing engine. It’s a transparent process that happens automatically – no manual intervention required
Regarding 64-bit vs 32-bit support, the recommendation would be that if the servers are memory constrained then they would probably be better off with 64-bit, but if they are processor constrained then 64-bit probably wouldn’t do much for them. For details see: http://www-01.ibm.com/support/docview.wss?uid=swg21296452.