you can simply use telnet DOS based command to go through specified port that has no firewall restriction, you can even log on to their server at your own risk!

Oh great this is an interesting Issue, if you want develop any program on Hp or PDA you need to install simulation soft ware first on your system, for offline testing b/4 you actually use a program on hp live enviroment. moreover you can even use .NET for coding your program inleu of java
furthermore you can use any brand for the fully developed program you can find the list of browsers supporting different brands on the URL below
For more detail on how tos on .NET Mobile plz copy and paste the following link into you browser
                                                                                              http://www.w3schools.com/dotnetmobile/default.asp
you 'll for sure find A-Z how to