Very simple Fieldtype that lists FormBuilder forms in a select box on editing pages.

FieldtypeForms.module

<?php

/**
 * ProcessWire Form Fieldtype.
 * Stores reference to a single FormBuilder Form to allow easy selection on pages.
 *
 * ProcessWire 2.x
 * Copyright (C) 2012 by Ryan Cramer
 * Licensed under GNU/GPL v2, see LICENSE.TXT
 *
 * http://www.processwire.com
 * http://www.ryancramer.com
 *
 */

class FieldtypeForms extends Fieldtype {


	public static function getModuleInfo()
	{
		return array(
			'title' => 'FormBuilder Reference',
			'version' => 100,
			'summary' => 'Field that stores a reference to one FormBuilder form',
			'permanent' => false,
		);
	}


	public function getBlankValue(Page $page, Field $field)
	{
		return 0;
	}


	public function sanitizeValue(Page $page, Field $field, $value)
	{
		if ( ! $value) return 0;
		$fb = $this->modules->get('FormBuilder');
		return ($fb->isForm($value) ? (int) $value : 0);
	}


	public function ___wakeupValue(Page $page, Field $field, $value)
	{
		$v = $this->getBlankValue($page, $field);
		return (empty($value) ? $v : $value);
	}


	public function ___sleepValue(Page $page, Field $field, $value)
	{
		return (is_int($value) ? $value : 0);
	}


	/**
	 * Instantiate the templates
	 *
	 * This method is only used when $page->outputFormatting is true.
	 *
	 */
	public function ___formatValue(Page $page, Field $field, $value)
	{
		if ( ! is_int($value)) return;

		$fb = $this->modules->get('FormBuilder');

		$form = $fb->load($value);
		return ($form ? $form->name : NULL);
	}


	public function getInputfield(Page $page, Field $field)
	{
		$inputfield = $this->modules->get('InputfieldSelect');
		$inputfield->attr('name', $field->name);

		$fb = $this->modules->get('FormBuilder');
		$forms = $fb->get('forms');

		foreach ($forms as $id => $name)
		{
			$inputfield->addOption($id, $name);
		}

		return $inputfield;
	}


	public function getDatabaseSchema(Field $field)
	{
		$schema = parent::getDatabaseSchema($field);
		$schema['data'] = 'int NOT NULL';
		$schema['keys']['data'] = 'KEY data (data, pages_id)';
		return $schema;
	}


	public function ___getCompatibleFieldtypes(Field $field)
	{
		$fieldtypes = new Fieldtypes();
		return $fieldtypes;
	}


}

Great, Thanks !

Just about started building this exact thing the over the weekend. Thought I'd better search first (figured @somartist would have built something to be honest). Found a forum topic that led me here. Much appreciated.

@craigrodway, any chance of publishing this in the PW modules repository?