Default behavior of the UIWebView is : eat touchXXX events and not send them to the nextResponder. One way to be able to catch this kind of event on a UIWebView is to add on top of it a UIView. But at this point, links, scroll, etc... are not capture to inner components of the under UIWebView. Here is a HACK to make this struff work : 
//
//  TouchUIWebView.h
//
//  Created by Vincent Demay on 19/06/09.
//  Copyright 2009 __MyCompanyName__. All rights reserved.
//

#import 

@interface DummyTapView : UIView {
	
	UIView * uiScroller_;
	UIView * uiWebDocumentView_;
}
@property(nonatomic, retain) UIView *uiScroller;
@property(nonatomic, retain) UIView *uiWebDocumentView;

@end


@interface TouchUIWebView : UIWebView {
}

@end

//
//  TouchUIWebView.m
//
//  Created by Vincent Demay on 19/06/09.
//  Copyright 2009 __MyCompanyName__. All rights reserved.
//

#import "TouchUIWebView.h"


const char* kUIScrollerName = "UIScroller";
const char* kUIWebDocumentView= "UIWebDocumentView";

@implementation DummyTapView

@synthesize uiScroller = uiScroller_;
@synthesize uiWebDocumentView = uiWebDocumentView_;

//
// retreive the scroller view in uiwebView
// used to compute scrolling in the loaded web page
//
- (UIView*) uiScroller {
	if( self.superview !=nil && uiScroller_ == nil ) {
		NSArray *views = [self.superview subviews];
		for( id view in views ) {
			const char* name = object_getClassName(view);
			if( !strncmp( name, kUIScrollerName, strlen(name) ) ) {
				uiScroller_ = view;
				return uiScroller_;
			}
		}
	}
	return uiScroller_;
}

//
// retreive the document view in UiWebView
// used to compute touch on link etc...
//
- (UIView*) uiWebDocumentView {
	if( self.superview != nil && uiWebDocumentView_ == nil ) {
		NSArray *views = [self.uiScroller subviews];
		for( id view in views ) {
			const char* name = object_getClassName(view);
			if( !strncmp( name, kUIWebDocumentView, strlen(name) ) ) {
				uiWebDocumentView_ = view;
				return uiWebDocumentView_;
			}
		}
	}
	return uiWebDocumentView_;
}

- (id) initWithFrame:(CGRect)frame {
	self = [super initWithFrame:frame];
	self.backgroundColor = [UIColor clearColor];
	return self;
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
	[self.uiScroller touchesBegan:touches withEvent:event];
	[self.uiWebDocumentView touchesBegan:touches withEvent:event];
	[self.nextResponder touchesBegan:touches withEvent:event];

}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
	[self.uiScroller touchesMoved:touches withEvent:event];
	[self.uiWebDocumentView touchesMoved:touches withEvent:event];
	[self.nextResponder touchesMoved:touches withEvent:event];

}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
	[self.uiScroller touchesEnded:touches withEvent:event];
	[self.uiWebDocumentView touchesEnded:touches withEvent:event];
	[self.superview didFinishGesturesInView:self.superview forEvent:event];
	[self.nextResponder touchesEnded:touches withEvent:event];

}

- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {
	[self.uiScroller touchesCancelled:touches withEvent:event];
	[self.uiWebDocumentView touchesCancelled:touches withEvent:event];
	[self.nextResponder touchesCancelled:touches withEvent:event];

}
@end



@implementation TouchUIWebView

- (id)initWithFrame:(CGRect)frame
{
    if (self = [super initWithFrame:frame]) {
        // Initialization code	
		DummyTapView* view = [[DummyTapView alloc] 
							  initWithFrame:CGRectMake( 0,0,self.frame.size.width,self.frame.size.height)];
		[self addSubview:view];
		[view release];
    }
    return self;
	
}

@end