I don't know much about VSTO or VSTA, but I think you need the full version of Visual Studio to use either one. I can't convince my boss to buy us this, but I would like to develop Excel addins in IronPython. I've looked at several tutorials that show you how interact with Excel using IronPython, but I can't find much about developing addins. Can you recommend any resources?
Is my only option making a COM addin? If so, does anybody know of any example of this using IronPython?
I'm sorry to say I can't go with any options that include spending money. I've got the free Visual Studio Shell and IronPython tools for visual studio setup for free right now.