I have made some changes in my Sexy Combo jQuery plugin. I have added three new configuration options that allow you to set combo's width, empty text and perform autofilling. The first option is obvious. The second option lets you use combobox without using labels (empty text appear when the text input has no focus and the user did not input something to it), and I think it may be good for some layouts. Autofilling option allows you to configure the plugin so that the first item of the dropdown list will become the value of the text input when the dropdown list is shown. However, the text that was added to the input would be selected, so the end user will be able to easily remove it.
I have also fixed 2 issues. The first was visible when you had combobox at the bottom of the page, so dropdown list caused the window to scroll. The second was that Sexy Combo did not allow to "jump" to another form elements using TAB key.
P.S. Thanks to Nikita Melnichenko who told me about TAB key issue and the author of 37 Phenomenal jQuery Plugins and Demos for Developers who mentioned Sexy Combo in his great article.