I currently am not available for any sort of paid consulting work. Consulting presents various legal (contracts, NDAs, etc.) and financial (taxes, collections, etc.) challenges as well as time challenges. I work full-time for Google and since Google is in just about every business imaginable, even if I had the time, it would be difficult to work anywhere else without a conflict of interest.
How I can help you anyway
I am happy to spend some of my time, and it presents no conflicts for me, to answer questions and provide advice in various public forums. Your best bet would be to write up your question (be as specific as possible) on StackOverflow and tag it appropriately (“mysql”, “innodb”, etc.) and then send me a link to that post. I’ll do my best to answer it, and everyone can benefit from the answer for years to come.
I also occasionally lurk on IRC in Freenode #mysql and #maria channels. Feel free to message me privately there if I don’t seem to be around.
If you are really desperate and have a specific and somehow confidential question, you can also email me your question directly. I will try to answer, but I cannot promise any reply.