Hi,
to get the current page from a pager you can use this code:
var pager:com.ibm.xsp.component.UIPager = getComponent("pager1");
var pagerState:com.ibm.xsp.component.UIPager$PagerState = pager.createPagerState();
pagerState.getCurrentPage()
It returns 0 for the 1st Page, 1 for the 2nd etc.
Hope this helps
Sven