Finally – someone has released the full package!
Bit Web Server (AMP; also see their homepage) stack running on Android. No hacking required. $2 to pay though!
If you are looking for a stack for iOS then the cydia-ios-lighttpd-php-mysql-web-stack does the trick: Should run lighttpd + php 5.4 + mysql – unfortunately only on jailbroken devices.
Edit: In case anyone is interested I have switched to Windows 8 tablet which happily runs all of the opensource AMP stacks. Runs very nicely and with a bit of Bootstrap styling I have a full feature sales order “app” for nothing. Little bit of code to sync back to the online version – no need to spend $50 per month per user on HandShake or similar.