Hello Vasile,
The boards available at digilentinc.com are very inexpensive and easy to 
use.
It can be difficult to get started because the tools are very 
complicated but if you read some labs that universities provide online 
it can be much easier. Take for example a verilog counter module (it's 
NOT a function):

module count_8b(out,clock,reset);
    output [7:0]out;
    input clock,reset;
    reg [7:0]out;
    wire clock,reset;

    always @(posedge clock)
    if(reset==1)
       out=8'b0;
    else
       out=out+1'b1;
endmodule

You then generally have "top" module that links together the modules, 
and a UCF (user constraints file) that links the ports (out,clock,reset) 
to physical hardware pins. You would use the Xilinx ISE or Webpack tool 
to compile, synthesize, and program the Xilinx part or create a PROM file.
I don't know about any user groups talking about FPGAs. Maybe you could 
help me with that part?
Digilent provides schematics for their development boards. Perhaps you 
could borrow their schematics? It's nothing more than a reference design 
I'm sure.
I'd be happy to help more if I can.
--
Martin K

Vasile Surducan wrote:
> I'm interested if there is somewhere a good&fast tutorial about using
> Xilinx FPGA.
> How should start someone who never heard about FPGA (except reading
> *all* datasheet and application note from Xilinx website) for getting
> a valid hardware design with an FPGA+flash PROM combination.
> Maybe a good usergroup talking about FPGA ? Other suggestions?
>
> thx,
> Vasile
>   
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