What are some avenues to keep me connected to mathematics education?
There are many avenues. One of the is activites of ICMI - the international group that focuses on mathematics instruction / teaching. One of their major activites is the once-every-four years ICME. The last one ICME-11 was in Mexico. The next one ICME-12 is in Korea (2012). The proceedings of ICME-10 in Copenhagen, Denmark is available. See Niss. M. & Emborg E. (Eds.). (2008). Proceedings of the 10th International Congress on Mathematical Education, Roskilde, Denmark: IMFUFA. An electronic version is downloadable from: http://www.icme10.dk/proceedings/pages/side01main.htm
The ICME-12 congress will be held in Seoul, Korea, on July 8-15, 2012.
The printed version (together with a CD-ROM with all the regular lectures) costs 50 euros (including shipment). The order form is available at the same address.
Personally, I have been to every ICME since Japan (2000). This conference helps one updated about the latest developments in all areas of mathematics education research. It also offers a chance to catch up with overseas collaborators and form new networks. It is a good sounding board for PhD students to get other opinions about their research problem. I have always encouraged my own to do so.