Dustin_Calgary wrote:

To add to that maybe make it more clear, the る is added AFTER katakanizing the foreign word in order to make it a verb

Thanks - I did realise that, but was wondering how productive it is - I just can't think of very many examples at all, which I guess it why it looks a bit odd...

サボる is another common one (and interesting in that the loanword it comes from doesn't have the る sound in it). Also there's slang like マクる meaning 'to eat at McDonalds'. (I was told about that one five years ago now so no doubt it's seriously out of date by now )

The final section of the wikipedia page on サボる suggests that ダブる and サボる are basically the only ones in really common use, and that there aren't very many others.

I think it's suggestive that both ダブる (in one sense) and サボる are school-related words; I'd guess that they're both teenage slang words that made it into the big-time.

Here's another that puts kanji in the mix: http://en.wikipedia.org/wiki/Kunoichi (with some notes about mixing...)

You can also use katakana for the roots of certain verbs to use them for particular meanings, e.g., もうヤッた？ (やる as "get laid").

There are multi-alphabet nouns too. For example, テレビっ子 is a child who spends a lot of time watching TV like a couch potato. As you can see, it has katakana (テレビ), hiragana (っ), and kanji (子).