[AccessD] A2K: Speed up access over a network

Hello all
I realise the q is very broad and has a million possible suggestions
That's what I'm after
 
I have a client who I am developing an app for. So far they are very
pleased.
But just the other day....They now want to be able to use the app 
after hours at home on their laptops. (And they are prepared to pay for this
major re-direction)
 
So this means connecting (in some cases) to the back end using dial up
<Sheesh>
 
Am I in the wrong business here?
 
Is this time to migrate the App to be browser based? (Which I know nothing
about by the way)
 
If you guys have successfully got your Access Apps to work at any decent
sort of speed
over dial up can you let me know how??
 
Many thanks
 
Darren