I would like to contact Mahmud either telephone or email. I thought I saw a mention in LP but can't find the page. Any help appreciated.

Please check page 172 of LP Guide (New edition). I am also giving his details as under :
e-mail : mahmud.bangladesh@gmail.com
web : www.mahmud.bigbig.com

I just want to say Mahmud, hats off to you. :-)
I first started researching for Bangladesh on the Indiamike forums where you so cordially invited travelers to your country when you started the thread "Why Bangladesh?" and I found your information very helpful, It is amazing what you are doing. For me and for many others I am sure, Bangladesh and Mahmud will become synonymous :-)
Thanks and all the best,
Siddharth from India (visiting Bangladesh in April)