Pygame w/ GUI

[PatrickMinnesota]

I know this isn't strictly a Python question, but I'm betting some
here might be able to give me a hint.

I have a few graphical programs doing some 2D data visualization using
simple Pygame code for pseudo real-time animation.   It's running
under windows XP right now, but eventually it'll need to be cross-
platform.  As it is right now, it probably is, I just haven't tried it
anywhere but XP.

Now I want to wrap some simple GUI functions around it.  I'm looking
for some buttons, a text field or two and file system selection of
data files.  I figure many have done this and there is a better
solution than to use Pygame constructs to implement such things.

My question:  I'm not seeing much support in Pygame for that stuff.
It seems I should build buttons and file browsing in some other
toolkit.  Is that true?  Or am I just to early on in the Pygame docs
to see solutions?

If I should use something else, am I going to be able to use Tkinter
or WxPython in conjunction with my Pygame code?  Or is there something
else I should be looking at?

Oh, and I'm running Python 2.5.1

Thanks for any thoughts.