[Please add your comments below to help build a strong case]
Since the FORMS 2.0 idea from Glen Lipka has long been lost, it's time to bring it back and get it on the agenda. It only been raised as an issue for 3 years and more than 2 versions of this community. Even one of recent ideas from the community for the Amazing Race Idea was for form improvements: Form Widgets!.
Basically Forms need to be come way easier without manipulation through code. There are a lot of small improvements that could be made to the form functionality that would be a great benefit to clients without access to a web developer skill set.
At one time or another, I have had marketers request most of the following list of form improvements:
support for HTML5 form elements
allow pre-population on a field by field basis as a form designer attribute
allow text fields to optionally concatenate the new value with the existing data
field masking for phone, sin number etc.
add real-time (onblur) validation, validation test conditions and contextual error msgs
min and max for numbers etc.
phone with or without extention
domain name for spam exclusion - i.e. email@example.com firstname.lastname@example.org
alpha-only for names/text fields
Automatic formating for proper case including whitespace trimming
better positioning of the field label and error msg
more form layouts in terms of 2-3 columns layouts as well as fields that can span the columns
more control over the submit button:
dynamic button text both before and after click text to make the form reusable on more that one landing page within the landing page editor
enable/disable submit based upon required fields/validation
provide more advanced type of controls:
dropdowns (combobox) with icons, option groups etc.
better support for checkboxes/radio with multi-select
dependant selections or skip logic i.e. country/state and surveys
geo-ip support for country/state
automatic detection and support for iframes to get parent parameters, adjust the form's target = _top etc.
better (dynamic) follow up options - new windows, dynamic redirect based upon other form fields, parameters or cookies
Allow fields from SFDC objects other than contact and lead
Forms have been one of the least attended to areas of Marketo; it has literally been years since any significant improvements have been made while the competition has not been standing still waiting.
Below is a small list for just from this version of community: