Go to your library and ask for the Gayles Directory of Periodicals and list all the trade publications in the area you are interested in. Call the ad department of each magazine and ask for a media kit. You will be up-to date on all the key issues and current buzzwords in short order. This technique has been very effective for many of my clients. I assume you have some sales skills developed during your time in real estate or earlier in your career.
Compensation varies widely across the industry.
Some of the more demanding organizations will compensate their top producers at 150-200K, including bonuses and stock options. Beleive me, they earn it. There's lots of talk about the internet as a job-creation machine. However, not everybody will be creating web pages and writing HTML code. As the sector matures, the jobs within it will become much more like the rest of the economy.