Development Hell: MMS Type Motorcycle Estoril and MMS Type Cruiser Jill Rivers; two prototype Shinkis with armor that could be configured into a Motorcycle mode. Sadly, there has been no word from Konami on if they ever come out.
Beyond these two you have Flamberge and Corsesca. Two unknown types that were only shown as unpainted prototypes and drawings.
Fan Nickname: "Babypuncher" for Juvisy, due to how powerful she could become in Battle Rondo if she's given the right parts.
No Export for You: There was a short North American release of the franchise, but it came as quickly as it went. And with the current market, your best bet for getting one is importing.
Related to the Anime
Talking To Herself: In Episode 6, Kana Asumi voices not just Ann, but also the terrorist and SWAT Arnvals.