can a webform be in a block?

I have not used webform but there are some issues you should be aware of. The first is to see how the action is set, it normally defaults to the page being viewed and in the case of placing a form in a block this would be incorrect. Modules like the search module set the action so they will work in a block. A quick check shows action not being set by the webform module so this would be an issue.

And cutting and pasting a form will generally not work in Drupal as it does security checks to avoid unwanted postings but it generally means forms not generated with the forms API will not work. And while the original form is produced by the form API, there are parts of the form data that are dynamic and "expire" after a certain amount of time.

Views thus far in Drupal 6.x show the teaser, but not the form part itself. Any workarounds?

I created a new block with the input format as PHP and used this code to get it to work:

print node_view(node_load($nid), $teaser = FALSE, $page = FALSE, $links = TRUE);

Don't use the Webform block module - it's not updated fast enough and it's not compatible with the latest D6 webform version. The views solution is preferable.

I was having trouble with this in a situation where I wanted to reuse a single webform in two sections of our site. Our node id was node/21, but the page url(s) I wanted the form located on was called residential/contact and commercial/contact. These both worked fine until a user tried to submit the form and there were validation errors, the form would submit to the node breaking the design around the form. After fiddling around with the view solution mentioned here and still seeing the same issues, I resorted to the following code to change the form action to match the page url. Easy, simple, clean.

I created a file called behavior.js and put it in the theme's root folder.

In my theme's .info file, I placed a reference to behavior.js:
scripts[] = script.js => This is the orginal line.
scripts[] = behavior.js => This is the addition.

Then the code in behavior.js was 5 simple lines.

Drupal.behaviors.setWebFormAction = function (context) {
	if ($("#webform-client-form-21").length > 0) {
		$("#webform-client-form-21").attr("action", window.location.pathname);
	}
}

However, when the form is submitted successfully, it loses page context again. Does anyone know exactly which file I would need to put in my theme folder to override the form redirecting back to the node when the form processing completes and instead redirect back to the page url the form was placed on?

Note: I'm using Drupal 6.16, Webform 6.x-3.0-beta5 and Nodes in block 6.x-1.5 to get the form to show up on multiple pages.

Thanks for the great answers.

yeah...it can. just visit the webform advance settings and see for block option. enable it and u have done what u want...now webform will appear in blocks.