I was asked recently if our plans for web based Forms capability using the new Office Forms Server 2007 would include the ability to have these forms in mobile devices. The answer is of course yes it does (see no. 10 in the top 10 benefits for using Forms Server 2007) . There is also a flash based demo that is worth a quick watch that includes the line 'fill out forms from any common web browser or mobile device' just in case you don't believe the top 10 benefits about Office Forms Server.