Consulting topics cover the following (but not limited to)
The communication normally goes through electronic ways (emails and Skype for example).
Ever find a nasty bug in the products? Want to have it fixed as soon as possible? Contact the developer and request a quick fix, and it can save you tons of days of waiting for a fix usually.
Though it might be rare, if you are interested in onsite support you can invite Lex to your office to discuss the issues you meet face to face.