Ok, so I updated the spectrum emulator to run in Silverlight 3.
The performance is now amazing, due to GPU Acceleration, WriteableBitmap, and it also runs out of browser (right click and install).
I guess I will update it with more SL3 features at some point. Have fun writing spectrum basic, and playing manic miner etc.
Click your mouse within the emulator to begin
Symbol Shift is the Home Key, Remember Shift 0 is backspace, and Symbol Shift (home) P is a quote mark.
The emulator works with .SNA files, which you should be able to download from various sites and run via the Open File option, just search for .sna and whatever game.
Play with it