Hi Mat, and welcome to minimins.
There are a number of VLCD diets on here (Lighter life, Cambridge Diet, W8, Lipotrim etc) These are all meal replacements. I am currently following the W8 plan which you can do online or with a group and its £49 per week for the packs. I know Cambridge and Lipotrim are cheaper but not sure by how much and Lighter life is the most expensive as it also has a strong counselling support element - if that's what you need (think its about £69 or so per week)
At the end of the day though, there is a calories in/calories out equation and it depends just how quickly you want to lose the weight. Sometimes writing down what you are currently eating and then just cutting out the "empty" calories (sweets, chocolate, booze etc) can have a massive impact on losing weight.
The easiest "normal" diet I have followed has been Slimming World and if you like eating....its your boy!
I guess it depends on whether you need the discipline of going to a class to be weighed or you are good enough to do this on your own - with the help of the minimins site as motivation to keep going. With slimming world at the moment you can join and get the stuff that tells you how to follow the plan for about £9 at the moment and then just follow it yourself without going to class. I have to say that when I have done that before though I was not disciplined enough. Maybe you could get someone else to weigh you each week so that you know that you cannot cheat!!! I do that with my husband now - and believe me, he's tougher than any diet class leader would be!
In terms of posting, just post wherever you like. Some of the sections have obvious headings but most people are happy for you to post wherever and respond to whatever you like. We are a really friendly lot
Good luck on your journey and let us know what you plan on doing - then you can join whatever forum comes closest to your chosen plan - while dipping in and out of all the others.
Sorry for the long post...you caught me in a chatty mood.
LRO xx