This is a cheat sheet we've put together to aid the construction of the Apache Solr CCK Drupal module. Maybe it'll be useful to someone else.

CCK Packaged fields/widgets

• number_integer
  • number
  • optionwidgets_select
  • optionwidgets_buttons
  • optionwidgets_onoff
• number_decimal
  • number
  • optionwidgets_select
  • optionwidgets_buttons
  • optionwidgets_onoff
• number_float
  • number
  • optionwidgets_select
  • optionwidgets_buttons
  • optionwidgets_onoff
• text
  • text_textfield
  • text_textarea
  • optionwidgets_select
  • optionwidgets_buttons
  • optionwidgets_onoff
• nodereference
  • nodereference_select
  • nodereference_buttons
  • nodereference_autocomplete
• userreference
  • userreference_select
  • userreference_buttons
  • userreference_autocomplete

DATE fields/widgets

• date
  • date_select
  • date_select_repeat
  • date_text_repeat
  • date_text
  • date_popup
  • date_popup_repeat
• datestamp
  • date_select
  • date_select_repeat
  • date_text_repeat
  • date_text
  • date_popup
  • date_popup_repeat
• datetime
  • date_select
  • date_select_repeat
  • date_text_repeat
  • date_text
  • date_popup
  • date_popup_repeat

FILEFIELD/IMAGEFIELD fields/widgets

• filefield
  • filefield_widget
  • imagefield_widget

FIVESTAR fields/widgets

• fivestar
  • stars
  • radios

LINK fields/widgets

• link
  • link