Alpha sheets can now be added to games via the edit option in the alpha sheet display. In addition, statblock embedding should also work for the [sb=show][/sb] tags. Any problems, please post in experimental features with links to the sheet and the game.
I'd recommend floorplanner.com for modern games. It's a quick and easy way to draw up basic...um...floorplans for your game. If I were using it for an online game, I'd probably import it into maptool or something like that so I could layer it and add tokens and stuff.