Reg fee for MSQL(.)net? Far from it! MSQL = Microsoft SQL or quite simply, "mSQL". Loads of development potential. I'd say low $xxx undeveloped and easily mid-high $xxx or possibly low $x,xxx if developed properly.
I'd personally wait until LLLL.nets are sold out and MSQL will be a gem.
FFLU(.)net - Currently reg fee unless developed
SQQL(.)net - Currently reg fee unless developed, if it generates some "SQL.net" typo traffic then definitely more
RRUP(.)net - Currently reg fee unless developed
Right now the buy out is still going on so domains with bad letters right now are barely above reg fee. I have been selling them on ebay though at $10 a pop for the most part, some go higher and some don't sell.
I've thought about developing MSQL.NET as a Microsoft SQL site. Not sure about using it as a MySQL site though - I will have a think about it. I'm glad a few people have mentioned this though.
I'm not sure what I could develop the rest into as yet.
Thanks for the all the advice... greatly appreciate it.